diff --git a/api/app/base/type.py b/api/app/base/type.py
new file mode 100644
index 00000000..fecbe13a
--- /dev/null
+++ b/api/app/base/type.py
@@ -0,0 +1,25 @@
+from pydantic import BaseModel, Field
+from sqlalchemy import TypeDecorator, JSON
+
+
+class PydanticType(TypeDecorator):
+    impl = JSON
+
+    def __init__(self, pydantic_model: type[BaseModel]):
+        super().__init__()
+        self.model = pydantic_model
+
+    def process_bind_param(self, value, dialect):
+        # 入库：Model -> dict
+        if value is None:
+            return None
+        if isinstance(value, self.model):
+            return value.dict()
+        return value   # 已经是 dict 也放行
+
+    def process_result_value(self, value, dialect):
+        # 出库：dict -> Model
+        if value is None:
+            return None
+        # return self.model.parse_obj(value)  # pydantic v1
+        return self.model.model_validate(value)  # pydantic v2
diff --git a/api/app/models/agent_app_config_model.py b/api/app/models/agent_app_config_model.py
index a4645791..0a7a5935 100644
--- a/api/app/models/agent_app_config_model.py
+++ b/api/app/models/agent_app_config_model.py
@@ -3,8 +3,9 @@ import uuid
 from sqlalchemy import Column, String, Boolean, DateTime, Text, ForeignKey
 from sqlalchemy.dialects.postgresql import UUID, JSON
 from sqlalchemy.orm import relationship
+
+from app.base.type import PydanticType
 from app.db import Base
-from app.models.multi_agent_model import PydanticType
 from app.schemas import ModelParameters
 
 
diff --git a/api/app/models/multi_agent_model.py b/api/app/models/multi_agent_model.py
index 07134d27..544ddb27 100644
--- a/api/app/models/multi_agent_model.py
+++ b/api/app/models/multi_agent_model.py
@@ -8,6 +8,7 @@ from sqlalchemy import Column, String, Boolean, DateTime, Integer, Float, Text,
 from sqlalchemy.dialects.postgresql import UUID, JSON
 from sqlalchemy.orm import relationship
 
+from app.base.type import PydanticType
 from app.db import Base
 from app.schemas import ModelParameters
 
@@ -23,27 +24,27 @@ class AggregationStrategy(StrEnum):
     VOTE = "vote"
     PRIORITY = "priority"
 
-class PydanticType(TypeDecorator):
-    impl = JSON
+# class PydanticType(TypeDecorator):
+#     impl = JSON
 
-    def __init__(self, pydantic_model: type[BaseModel]):
-        super().__init__()
-        self.model = pydantic_model
+#     def __init__(self, pydantic_model: type[BaseModel]):
+#         super().__init__()
+#         self.model = pydantic_model
 
-    def process_bind_param(self, value, dialect):
-        # 入库：Model -> dict
-        if value is None:
-            return None
-        if isinstance(value, self.model):
-            return value.dict()
-        return value   # 已经是 dict 也放行
+#     def process_bind_param(self, value, dialect):
+#         # 入库：Model -> dict
+#         if value is None:
+#             return None
+#         if isinstance(value, self.model):
+#             return value.dict()
+#         return value   # 已经是 dict 也放行
 
-    def process_result_value(self, value, dialect):
-        # 出库：dict -> Model
-        if value is None:
-            return None
-        # return self.model.parse_obj(value)  # pydantic v1
-        return self.model.model_validate(value)  # pydantic v2
+#     def process_result_value(self, value, dialect):
+#         # 出库：dict -> Model
+#         if value is None:
+#             return None
+#         # return self.model.parse_obj(value)  # pydantic v1
+#         return self.model.model_validate(value)  # pydantic v2
 
 class MultiAgentConfig(Base):
     """多 Agent 配置表"""
diff --git a/api/app/services/app_service.py b/api/app/services/app_service.py
index 7a4e46fb..b97bf874 100644
--- a/api/app/services/app_service.py
+++ b/api/app/services/app_service.py
@@ -33,6 +33,7 @@ from app.services.agent_config_converter import AgentConfigConverter
 from app.models import AppShare, Workspace
 from app.services.model_service import ModelApiKeyService
 from app.services.workflow_service import WorkflowService
+from app.utils.app_config_utils import model_parameters_to_dict
 
 # 获取业务日志器
 logger = get_business_logger()
@@ -1175,7 +1176,7 @@ class AppService:
 
             config = {
                 "system_prompt": agent_cfg.system_prompt,
-                "model_parameters": agent_cfg.model_parameters,
+                "model_parameters": model_parameters_to_dict(agent_cfg.model_parameters),
                 "knowledge_retrieval": agent_cfg.knowledge_retrieval,
                 "memory": agent_cfg.memory,
                 "variables": agent_cfg.variables or [],
@@ -1204,8 +1205,10 @@ class AppService:
             default_model_config_id = multi_agent_cfg.default_model_config_id
 
             # 4. 构建配置快照
+            
+            
             config = {
-                "model_parameters":multi_agent_cfg.model_parameters,
+                "model_parameters": model_parameters_to_dict(multi_agent_cfg.model_parameters),
                 "master_agent_id": str(multi_agent_cfg.master_agent_id),
                 "orchestration_mode": multi_agent_cfg.orchestration_mode,
                 "sub_agents": multi_agent_cfg.sub_agents,
diff --git a/api/app/utils/app_config_utils.py b/api/app/utils/app_config_utils.py
index 97e64214..834d22af 100644
--- a/api/app/utils/app_config_utils.py
+++ b/api/app/utils/app_config_utils.py
@@ -5,13 +5,66 @@ Utility functions for converting between dict and model objects for different ap
 """
 
 import uuid
-from typing import Dict, Any, Optional
+from typing import Dict, Any, Optional, Union
 from datetime import datetime
 
 from app.models import AppRelease, WorkflowConfig
 from app.models.agent_app_config_model import AgentConfig
 from app.models.multi_agent_model import MultiAgentConfig
 
+
+def model_parameters_to_dict(model_parameters: Any) -> Optional[Dict[str, Any]]:
+    """将 ModelParameters 对象转换为字典
+    
+    Args:
+        model_parameters: ModelParameters 对象、字典或 None
+        
+    Returns:
+        字典格式的模型参数，如果输入为 None 则返回 None
+    """
+    if model_parameters is None:
+        return None
+    
+    if isinstance(model_parameters, dict):
+        return model_parameters
+    
+    # Pydantic v2
+    if hasattr(model_parameters, 'model_dump'):
+        return model_parameters.model_dump()
+    
+    # Pydantic v1
+    if hasattr(model_parameters, 'dict'):
+        return model_parameters.dict()
+    
+    # 其他情况尝试转换
+    try:
+        return dict(model_parameters)
+    except (TypeError, ValueError):
+        return None
+
+
+def dict_to_model_parameters(data: Optional[Dict[str, Any]]) -> Optional[Any]:
+    """将字典转换为 ModelParameters 对象
+    
+    Args:
+        data: 字典格式的模型参数或 None
+        
+    Returns:
+        ModelParameters 对象，如果输入为 None 则返回 None
+    """
+    if data is None:
+        return None
+    
+    from app.schemas import ModelParameters
+    
+    if isinstance(data, ModelParameters):
+        return data
+    
+    if isinstance(data, dict):
+        return ModelParameters(**data)
+    
+    return None
+
 class AgentConfigProxy:
     """Proxy class for AgentConfig (legacy compatibility)"""