diff --git a/Build_God_Api/Build_God_Api/Controllers/BagController.cs b/Build_God_Api/Build_God_Api/Controllers/BagController.cs
index a1eb287..6e2f8cf 100644
--- a/Build_God_Api/Build_God_Api/Controllers/BagController.cs
+++ b/Build_God_Api/Build_God_Api/Controllers/BagController.cs
@@ -107,6 +107,36 @@ namespace Build_God_Api.Controllers
             return await service.DestroyBagItem(characterBagId, dto.ItemType, dto.ItemDbId);
         }
 
+        [HttpGet("character/{characterId}/equipped")]
+        [Authorize]
+        public async Task<ActionResult<List<EquippedSlotDto>>> GetEquippedSlots(int characterId)
+        {
+            return await service.GetEquippedSlots(characterId);
+        }
+
+        [HttpGet("character/{characterId}/equipment-instances")]
+        [Authorize]
+        public async Task<ActionResult<List<EquipmentInstanceBagDto>>> GetBagEquipmentInstances(int characterId)
+        {
+            return await service.GetBagEquipmentInstances(characterId);
+        }
+
+        [HttpPost("character/{characterId}/equipped")]
+        [Authorize]
+        public async Task<ActionResult<bool>> EquipEquipmentInstance(int characterId, [FromBody] EquipEquipmentInstanceDto dto)
+        {
+            return await service.EquipEquipmentInstance(characterId, dto.EquipmentInstanceId);
+        }
+
+        [HttpPost("character/{characterId}/equipped/unequip")]
+        [Authorize]
+        public async Task<ActionResult<bool>> UnequipEquipmentSlot(int characterId, [FromBody] UnequipSlotDto dto)
+        {
+            if (!Enum.IsDefined(typeof(EquipmentType), dto.Slot))
+                return BadRequest("无效的装备槽");
+            return await service.UnequipSlot(characterId, (EquipmentType)dto.Slot);
+        }
+
         // ============ 枚举 ============
 
         [HttpGet("rarities")]
@@ -142,4 +172,15 @@ namespace Build_God_Api.Controllers
         public int ItemType { get; set; }
         public int ItemDbId { get; set; }
     }
+
+    public class EquipEquipmentInstanceDto
+    {
+        public int EquipmentInstanceId { get; set; }
+    }
+
+    public class UnequipSlotDto
+    {
+        /// <summary>EquipmentType：1 武器 2 防具 3 饰品</summary>
+        public int Slot { get; set; }
+    }
 }
diff --git a/Build_God_Api/Build_God_Api/DB/CharacterEquippedSlot.cs b/Build_God_Api/Build_God_Api/DB/CharacterEquippedSlot.cs
new file mode 100644
index 0000000..5685fa1
--- /dev/null
+++ b/Build_God_Api/Build_God_Api/DB/CharacterEquippedSlot.cs
@@ -0,0 +1,18 @@
+using SqlSugar;
+
+namespace Build_God_Api.DB
+{
+    /// <summary>
+    /// 角色装备槽位（武器/防具/饰品各一条记录，未穿时 EquipmentInstanceId 为空）
+    /// </summary>
+    public class CharacterEquippedSlot : BaseEntity
+    {
+        public int CharacterId { get; set; }
+
+        /// <summary>武器、防具、饰品</summary>
+        public EquipmentType Slot { get; set; }
+
+        [SugarColumn(IsNullable = true)]
+        public int? EquipmentInstanceId { get; set; }
+    }
+}
diff --git a/Build_God_Api/Build_God_Api/DB/Equipment.cs b/Build_God_Api/Build_God_Api/DB/Equipment.cs
index ab685bf..87e73c4 100644
--- a/Build_God_Api/Build_God_Api/DB/Equipment.cs
+++ b/Build_God_Api/Build_God_Api/DB/Equipment.cs
@@ -66,14 +66,14 @@ namespace Build_God_Api.DB
     }
 
     /// <summary>
-    /// 装备实例 - 角色拥有的具体装备
+    /// 装备实例 - 角色拥有的具体装备（归属角色；是否在背上由 <see cref="CharacterEquippedSlot"/> 判定）
     /// </summary>
     public class EquipmentInstance : BaseEntity
     {
         /// <summary>
-        /// 角色背包关联ID
+        /// 所属角色 ID
         /// </summary>
-        public int CharacterBagId { get; set; }
+        public int CharacterId { get; set; }
 
         /// <summary>
         /// 装备模板ID
diff --git a/Build_God_Api/Build_God_Api/Program.cs b/Build_God_Api/Build_God_Api/Program.cs
index f010f00..7d9be02 100644
--- a/Build_God_Api/Build_God_Api/Program.cs
+++ b/Build_God_Api/Build_God_Api/Program.cs
@@ -90,6 +90,7 @@ namespace Build_God_Api
                 sqlSugarClient.CodeFirst.InitTables(typeof(MissionReward));
                 sqlSugarClient.CodeFirst.InitTables(typeof(Bag));
                 sqlSugarClient.CodeFirst.InitTables(typeof(CharacterBag));
+                sqlSugarClient.CodeFirst.InitTables(typeof(CharacterEquippedSlot));
                 sqlSugarClient.CodeFirst.InitTables(typeof(BagItem));
                 sqlSugarClient.CodeFirst.InitTables(typeof(MissionProgress));
                 sqlSugarClient.CodeFirst.InitTables(typeof(CharacterMissionProgress));
diff --git a/Build_God_Api/Build_God_Api/Scripts/equipment_character_id_postgresql.sql b/Build_God_Api/Build_God_Api/Scripts/equipment_character_id_postgresql.sql
new file mode 100644
index 0000000..275490c
--- /dev/null
+++ b/Build_God_Api/Build_God_Api/Scripts/equipment_character_id_postgresql.sql
@@ -0,0 +1,25 @@
+-- 装备实例与穿戴槽：CharacterBagId -> CharacterId（PostgreSQL）
+-- 仅用于「已有库且表上仍存在 CharacterBagId 列」的升级；全新库由 SqlSugar CodeFirst 建表即可，不要执行本脚本。
+-- 若执行时报错列不存在，说明已迁过或为新库，请跳过。
+
+-- EquipmentInstance
+ALTER TABLE "EquipmentInstance" ADD COLUMN IF NOT EXISTS "CharacterId" integer;
+
+UPDATE "EquipmentInstance" ei
+SET "CharacterId" = cb."CharacterId"
+FROM "CharacterBag" cb
+WHERE ei."CharacterBagId" IS NOT NULL
+  AND cb."Id" = ei."CharacterBagId";
+
+ALTER TABLE "EquipmentInstance" DROP COLUMN IF EXISTS "CharacterBagId";
+
+-- CharacterEquippedSlot
+ALTER TABLE "CharacterEquippedSlot" ADD COLUMN IF NOT EXISTS "CharacterId" integer;
+
+UPDATE "CharacterEquippedSlot" s
+SET "CharacterId" = cb."CharacterId"
+FROM "CharacterBag" cb
+WHERE s."CharacterBagId" IS NOT NULL
+  AND cb."Id" = s."CharacterBagId";
+
+ALTER TABLE "CharacterEquippedSlot" DROP COLUMN IF EXISTS "CharacterBagId";
diff --git a/Build_God_Api/Build_God_Api/Services/BagService.cs b/Build_God_Api/Build_God_Api/Services/BagService.cs
index 1699b1c..a3bf757 100644
--- a/Build_God_Api/Build_God_Api/Services/BagService.cs
+++ b/Build_God_Api/Build_God_Api/Services/BagService.cs
@@ -1,5 +1,6 @@
 using Build_God_Api.DB;
 using Build_God_Api.Dto;
+using Build_God_Api.Services.Game;
 using SqlSugar;
 
 namespace Build_God_Api.Services
@@ -29,6 +30,13 @@ namespace Build_God_Api.Services
 
         // 物品销毁
         Task<bool> DestroyBagItem(int characterBagId, int itemType, int itemDbId);
+
+        // 装备穿戴（仅统计 EquipmentInstance 槽位，参与属性计算）；入参为角色 ID
+        Task<List<EquippedSlotDto>> GetEquippedSlots(int characterId);
+        Task<bool> EquipEquipmentInstance(int characterId, int equipmentInstanceId);
+        Task<bool> UnequipSlot(int characterId, EquipmentType slot);
+        /// <summary>背包内未穿戴的装备实例（与槽位互斥）</summary>
+        Task<List<EquipmentInstanceBagDto>> GetBagEquipmentInstances(int characterId);
     }
 
     public class BagItemDto
@@ -58,6 +66,29 @@ namespace Build_God_Api.Services
         public int BagCapacity { get; set; }
     }
 
+    public class EquippedSlotDto
+    {
+        /// <summary>EquipmentType：1 武器 2 防具 3 饰品</summary>
+        public int Slot { get; set; }
+
+        public int? EquipmentInstanceId { get; set; }
+    }
+
+    public class EquipmentInstanceBagDto
+    {
+        public int Id { get; set; }
+        public int EquipmentTemplateId { get; set; }
+        public string Name { get; set; } = string.Empty;
+        public int Type { get; set; }
+        public int Rarity { get; set; }
+        public string Attributes { get; set; } = "[]";
+        public int EnhanceLevel { get; set; }
+        public int EnhanceBonusPercent { get; set; }
+        public int RequirdLevelId { get; set; }
+        public int? SetId { get; set; }
+        public bool IsBound { get; set; }
+    }
+
     public class BagService(ISqlSugarClient db) : IBagService
     {
         private readonly ISqlSugarClient db = db;
@@ -107,6 +138,8 @@ namespace Build_God_Api.Services
                 // 删除相关的物品和关联
                 foreach (var cb in characterBags)
                 {
+                    await db.Deleteable<CharacterEquippedSlot>().Where(x => x.CharacterId == cb.CharacterId).ExecuteCommandAsync();
+                    await db.Deleteable<EquipmentInstance>().Where(x => x.CharacterId == cb.CharacterId).ExecuteCommandAsync();
                     await db.Deleteable<BagItem>().Where(x => x.CharacterBagId == cb.Id).ExecuteCommandAsync();
                 }
                 await db.Deleteable<CharacterBag>().Where(x => x.BagId == id).ExecuteCommandAsync();
@@ -159,9 +192,11 @@ namespace Build_God_Api.Services
                     CharacterId = characterId,
                     BagId = bagId
                 };
-                await db.Insertable(characterBag).ExecuteCommandAsync();
+                await db.Insertable(characterBag).ExecuteReturnIdentityAsync();
             }
 
+            await CharacterEquippedSlotQueries.EnsureSlotsAsync(db, characterId);
+
             return true;
         }
 
@@ -357,12 +392,17 @@ namespace Build_God_Api.Services
         {
             if (itemType == (int)BagItemType.Equipment)
             {
+                var characterBag = await db.Queryable<CharacterBag>()
+                    .FirstAsync(x => x.Id == characterBagId)
+                    ?? throw new Exception("角色背包不存在");
+
                 var equipment = await db.Queryable<EquipmentInstance>()
-                    .FirstAsync(x => x.Id == itemDbId && x.CharacterBagId == characterBagId);
+                    .FirstAsync(x => x.Id == itemDbId && x.CharacterId == characterBag.CharacterId);
 
                 if (equipment == null)
                     throw new Exception("装备不存在");
 
+                await CharacterEquippedSlotQueries.ClearSlotReferencesToInstanceAsync(db, characterBag.CharacterId, itemDbId);
                 await db.Deleteable(equipment).ExecuteCommandAsync();
             }
             else
@@ -378,5 +418,94 @@ namespace Build_God_Api.Services
 
             return true;
         }
+
+        public async Task<List<EquippedSlotDto>> GetEquippedSlots(int characterId)
+        {
+            if (!await db.Queryable<Character>().AnyAsync(x => x.Id == characterId))
+                throw new Exception("角色不存在");
+
+            await CharacterEquippedSlotQueries.EnsureSlotsAsync(db, characterId);
+
+            return await db.Queryable<CharacterEquippedSlot>()
+                .Where(x => x.CharacterId == characterId)
+                .OrderBy(x => x.Slot)
+                .Select(x => new EquippedSlotDto
+                {
+                    Slot = (int)x.Slot,
+                    EquipmentInstanceId = x.EquipmentInstanceId
+                })
+                .ToListAsync();
+        }
+
+        public async Task<List<EquipmentInstanceBagDto>> GetBagEquipmentInstances(int characterId)
+        {
+            if (!await db.Queryable<Character>().AnyAsync(x => x.Id == characterId))
+                throw new Exception("角色不存在");
+
+            await CharacterEquippedSlotQueries.EnsureSlotsAsync(db, characterId);
+            var equippedIds = await CharacterEquippedSlotQueries.GetEquippedEquipmentInstanceIdsAsync(db, characterId);
+
+            var list = await db.Queryable<EquipmentInstance>()
+                .Where(x => x.CharacterId == characterId && !equippedIds.Contains(x.Id))
+                .OrderBy(x => x.Id)
+                .ToListAsync();
+
+            return list.ConvertAll(x => new EquipmentInstanceBagDto
+            {
+                Id = x.Id,
+                EquipmentTemplateId = x.EquipmentTemplateId,
+                Name = x.Name,
+                Type = (int)x.Type,
+                Rarity = (int)x.Rarity,
+                Attributes = x.Attributes,
+                EnhanceLevel = x.EnhanceLevel,
+                EnhanceBonusPercent = x.EnhanceBonusPercent,
+                RequirdLevelId = x.RequirdLevelId,
+                SetId = x.SetId,
+                IsBound = x.IsBound
+            });
+        }
+
+        public async Task<bool> EquipEquipmentInstance(int characterId, int equipmentInstanceId)
+        {
+            if (!await db.Queryable<Character>().AnyAsync(x => x.Id == characterId))
+                throw new Exception("角色不存在");
+
+            var instance = await db.Queryable<EquipmentInstance>()
+                .FirstAsync(x => x.Id == equipmentInstanceId && x.CharacterId == characterId);
+
+            if (instance == null)
+                throw new Exception("装备不存在或不属于该角色");
+
+            await CharacterEquippedSlotQueries.EnsureSlotsAsync(db, characterId);
+
+            await db.Updateable<CharacterEquippedSlot>()
+                .SetColumns(x => new CharacterEquippedSlot { EquipmentInstanceId = null, UpdatedOn = DateTime.UtcNow })
+                .Where(x => x.CharacterId == characterId && x.EquipmentInstanceId == equipmentInstanceId)
+                .ExecuteCommandAsync();
+
+            var slotType = instance.Type;
+            await db.Updateable<CharacterEquippedSlot>()
+                .SetColumns(x => new CharacterEquippedSlot { EquipmentInstanceId = equipmentInstanceId, UpdatedOn = DateTime.UtcNow })
+                .Where(x => x.CharacterId == characterId && x.Slot == slotType)
+                .ExecuteCommandAsync();
+
+            return true;
+        }
+
+        public async Task<bool> UnequipSlot(int characterId, EquipmentType slot)
+        {
+            if (!await db.Queryable<Character>().AnyAsync(x => x.Id == characterId))
+                throw new Exception("角色不存在");
+
+            await CharacterEquippedSlotQueries.EnsureSlotsAsync(db, characterId);
+
+            await db.Updateable<CharacterEquippedSlot>()
+                .SetColumns(x => new CharacterEquippedSlot { EquipmentInstanceId = null, UpdatedOn = DateTime.UtcNow })
+                .Where(x => x.CharacterId == characterId && x.Slot == slot)
+                .ExecuteCommandAsync();
+
+            return true;
+        }
     }
 }
diff --git a/Build_God_Api/Build_God_Api/Services/CharacterService.cs b/Build_God_Api/Build_God_Api/Services/CharacterService.cs
index 2a2011c..ed4bf04 100644
--- a/Build_God_Api/Build_God_Api/Services/CharacterService.cs
+++ b/Build_God_Api/Build_God_Api/Services/CharacterService.cs
@@ -385,6 +385,7 @@ namespace Build_God_Api.Services
                 BagId = bag.Id
             };
             await db.Insertable(characterBag).ExecuteCommandAsync();
+            await CharacterEquippedSlotQueries.EnsureSlotsAsync(db, characterId);
 
             return true;
         }
diff --git a/Build_God_Api/Build_God_Api/Services/Game/CharacterAttributeCalculateService.cs b/Build_God_Api/Build_God_Api/Services/Game/CharacterAttributeCalculateService.cs
index 4359ace..abd49cd 100644
--- a/Build_God_Api/Build_God_Api/Services/Game/CharacterAttributeCalculateService.cs
+++ b/Build_God_Api/Build_God_Api/Services/Game/CharacterAttributeCalculateService.cs
@@ -60,10 +60,15 @@ namespace Build_God_Api.Services.Game
             return (attackBonus, defendBonus, hpBonus);
         }
 
-        private async Task<EquipmentAttributeTotals> CalculateEquipmentBonusAsync(int characterBagId)
+        private async Task<EquipmentAttributeTotals> CalculateEquipmentBonusAsync(int characterId)
         {
+            await CharacterEquippedSlotQueries.EnsureSlotsAsync(_context, characterId);
+            var equippedIds = await CharacterEquippedSlotQueries.GetEquippedEquipmentInstanceIdsAsync(_context, characterId);
+            if (equippedIds.Count == 0)
+                return new EquipmentAttributeTotals();
+
             var equipmentInstances = await _context.Queryable<EquipmentInstance>()
-                .Where(x => x.CharacterBagId == characterBagId)
+                .Where(x => x.CharacterId == characterId && equippedIds.Contains(x.Id))
                 .ToListAsync();
 
             var totals = new EquipmentAttributeTotals();
@@ -97,13 +102,12 @@ namespace Build_God_Api.Services.Game
             decimal bonusHPFlat = 0;
             decimal bonusCritical = 0;
             decimal bonusCriticalDamage = 0;
-            var equipTotals = new EquipmentAttributeTotals();
+            var equipTotals = await CalculateEquipmentBonusAsync(character.Id);
 
             var characterBag = await _context.Queryable<CharacterBag>().FirstAsync(x => x.CharacterId == character.Id);
             if (characterBag != null)
             {
                 var (scrapAttack, scrapDefend, scrapHP) = await CalculateScrapBonusAsync(characterBag.Id);
-                equipTotals = await CalculateEquipmentBonusAsync(characterBag.Id);
 
                 bonusAttackFlat = scrapAttack + equipTotals.AttackFixed;
                 bonusDefendFlat = scrapDefend + equipTotals.DefendFixed;
@@ -111,6 +115,14 @@ namespace Build_God_Api.Services.Game
                 bonusCritical = equipTotals.CriticalRate;
                 bonusCriticalDamage = equipTotals.CriticalDamage;
             }
+            else
+            {
+                bonusAttackFlat = equipTotals.AttackFixed;
+                bonusDefendFlat = equipTotals.DefendFixed;
+                bonusHPFlat = equipTotals.HealthFixed;
+                bonusCritical = equipTotals.CriticalRate;
+                bonusCriticalDamage = equipTotals.CriticalDamage;
+            }
 
             decimal maxHp = EquipmentAttributeBonus.ApplyPercentToBaseAndFlat(baseMaxHP, bonusHPFlat, equipTotals.HealthPercent);
             decimal attack = EquipmentAttributeBonus.ApplyPercentToBaseAndFlat(baseAttack, bonusAttackFlat, equipTotals.AttackPercent);
diff --git a/Build_God_Api/Build_God_Api/Services/Game/CharacterEquippedSlotQueries.cs b/Build_God_Api/Build_God_Api/Services/Game/CharacterEquippedSlotQueries.cs
new file mode 100644
index 0000000..206fdc0
--- /dev/null
+++ b/Build_God_Api/Build_God_Api/Services/Game/CharacterEquippedSlotQueries.cs
@@ -0,0 +1,51 @@
+using Build_God_Api.DB;
+using SqlSugar;
+
+namespace Build_God_Api.Services.Game
+{
+    /// <summary>装备槽位表读写（供属性计算与 BagService 共用，避免重复逻辑）</summary>
+    public static class CharacterEquippedSlotQueries
+    {
+        private static readonly EquipmentType[] AllSlots =
+            [EquipmentType.Weapon, EquipmentType.Armor, EquipmentType.Accessory];
+
+        public static async Task EnsureSlotsAsync(ISqlSugarClient db, int characterId)
+        {
+            var existing = await db.Queryable<CharacterEquippedSlot>()
+                .Where(x => x.CharacterId == characterId)
+                .Select(x => x.Slot)
+                .ToListAsync();
+
+            var toInsert = new List<CharacterEquippedSlot>();
+            foreach (var slot in AllSlots)
+            {
+                if (existing.Contains(slot)) continue;
+                toInsert.Add(new CharacterEquippedSlot
+                {
+                    CharacterId = characterId,
+                    Slot = slot,
+                    EquipmentInstanceId = null
+                });
+            }
+
+            if (toInsert.Count > 0)
+                await db.Insertable(toInsert).ExecuteCommandAsync();
+        }
+
+        public static async Task<List<int>> GetEquippedEquipmentInstanceIdsAsync(ISqlSugarClient db, int characterId)
+        {
+            var ids = await db.Queryable<CharacterEquippedSlot>()
+                .Where(x => x.CharacterId == characterId && x.EquipmentInstanceId != null)
+                .Select(x => x.EquipmentInstanceId!.Value)
+                .ToListAsync();
+
+            return ids;
+        }
+
+        public static Task ClearSlotReferencesToInstanceAsync(ISqlSugarClient db, int characterId, int equipmentInstanceId) =>
+            db.Updateable<CharacterEquippedSlot>()
+                .SetColumns(x => new CharacterEquippedSlot { EquipmentInstanceId = null, UpdatedOn = DateTime.UtcNow })
+                .Where(x => x.CharacterId == characterId && x.EquipmentInstanceId == equipmentInstanceId)
+                .ExecuteCommandAsync();
+    }
+}
diff --git a/Build_God_Api/Build_God_Api/Services/ShopService.cs b/Build_God_Api/Build_God_Api/Services/ShopService.cs
index c9baf0f..7f901c1 100644
--- a/Build_God_Api/Build_God_Api/Services/ShopService.cs
+++ b/Build_God_Api/Build_God_Api/Services/ShopService.cs
@@ -165,7 +165,7 @@ namespace Build_God_Api.Services
             // 装备特殊处理：创建装备实例
             if (shopItem.ItemType == BagItemType.Equipment)
             {
-                await CreateEquipmentInstance(characterBag.Id, shopItem.ItemId);
+                await CreateEquipmentInstance(characterId, shopItem.ItemId);
             }
             else
             {
@@ -326,7 +326,7 @@ namespace Build_God_Api.Services
             return result;
         }
 
-        private async Task CreateEquipmentInstance(int characterBagId, int equipmentTemplateId)
+        private async Task CreateEquipmentInstance(int characterId, int equipmentTemplateId)
         {
             var template = await db.Queryable<EquipmentTemplate>()
                 .FirstAsync(x => x.Id == equipmentTemplateId)
@@ -338,7 +338,7 @@ namespace Build_God_Api.Services
 
             var instance = new EquipmentInstance
             {
-                CharacterBagId = characterBagId,
+                CharacterId = characterId,
                 EquipmentTemplateId = equipmentTemplateId,
                 Name = template.Name,
                 Type = template.Type,