diff --git a/backend/app/models/relationship.py b/backend/app/models/relationship.py
index 8b73c0f..5ffe3a8 100644
--- a/backend/app/models/relationship.py
+++ b/backend/app/models/relationship.py
@@ -38,7 +38,7 @@ class CharacterRelationship(Base):
     relationship_name = Column(String(100), comment="自定义关系名称")
     
     # 关系属性
-    intimacy_level = Column(Integer, default=50, comment="亲密度：0-100")
+    intimacy_level = Column(Integer, default=50, comment="亲密度：-100到100")
     status = Column(String(20), default="active", comment="状态：active/broken/past/complicated")
     description = Column(Text, comment="关系详细描述")
     
diff --git a/backend/app/schemas/relationship.py b/backend/app/schemas/relationship.py
index ba94db8..da8f5d3 100644
--- a/backend/app/schemas/relationship.py
+++ b/backend/app/schemas/relationship.py
@@ -27,7 +27,7 @@ class CharacterRelationshipBase(BaseModel):
     """角色关系基础模型"""
     relationship_type_id: Optional[int] = Field(None, description="关系类型ID")
     relationship_name: Optional[str] = Field(None, description="自定义关系名称")
-    intimacy_level: int = Field(50, ge=0, le=100, description="亲密度：0-100")
+    intimacy_level: int = Field(50, ge=-100, le=100, description="亲密度：-100到100")
     status: str = Field("active", description="状态：active/broken/past/complicated")
     description: Optional[str] = Field(None, description="关系描述")
     started_at: Optional[str] = Field(None, description="关系开始时间（故事时间）")
@@ -45,7 +45,7 @@ class CharacterRelationshipUpdate(BaseModel):
     """更新角色关系的请求模型"""
     relationship_type_id: Optional[int] = None
     relationship_name: Optional[str] = None
-    intimacy_level: Optional[int] = Field(None, ge=0, le=100)
+    intimacy_level: Optional[int] = Field(None, ge=-100, le=100)
     status: Optional[str] = None
     description: Optional[str] = None
     started_at: Optional[str] = None
diff --git a/backend/app/services/prompt_service.py b/backend/app/services/prompt_service.py
index b0add89..72969cc 100644
--- a/backend/app/services/prompt_service.py
+++ b/backend/app/services/prompt_service.py
@@ -248,7 +248,7 @@ class PromptService:
 2. **关系约束**：relationships_array只能引用本批次中已经出现的角色名称
 3. **组织约束**：organization_memberships只能引用本批次中is_organization=true的实体名称
 4. **禁止幻觉**：不要引用任何不存在的角色或组织，如果没有可引用的就留空数组[]
-5. intimacy_level和loyalty都是0-100的整数
+5. intimacy_level是-100到100的整数（负值表示敌对仇恨关系），loyalty是0-100的整数
 6. 角色之间要形成合理的关系网络
 
 **示例说明**：
@@ -682,7 +682,7 @@ class PromptService:
 **重要说明：**
 1. relationships数组：只包含与上面列出的已存在角色的关系，通过target_character_name匹配
 2. organization_memberships数组：只包含与上面列出的已存在组织的关系
-3. intimacy_level和loyalty都是0-100的整数
+3. intimacy_level是-100到100的整数（负值表示敌对、仇恨等关系），loyalty是0-100的整数
 4. 如果没有关系或组织，对应数组为空[]
 5. relationships_text是自然语言描述，用于展示给用户看
 
diff --git a/frontend/src/pages/Relationships.tsx b/frontend/src/pages/Relationships.tsx
index 4c70ffa..fc47a1d 100644
--- a/frontend/src/pages/Relationships.tsx
+++ b/frontend/src/pages/Relationships.tsx
@@ -133,6 +133,7 @@ export default function Relationships() {
     if (level >= 75) return 'green';
     if (level >= 50) return 'blue';
     if (level >= 25) return 'orange';
+    if (level >= 0) return 'volcano';
     return 'red';
   };
 
@@ -417,9 +418,15 @@ export default function Relationships() {
             initialValue={50}
           >
             <Slider
-              min={0}
+              min={-100}
               max={100}
-              marks={{ 0: '0', 25: '25', 50: '50', 75: '75', 100: '100' }}
+              marks={{
+                '-100': '-100',
+                '-50': '-50',
+                0: '0',
+                50: '50',
+                100: '100'
+              }}
             />
           </Form.Item>