diff --git a/apps/application/flow/step_node/ai_chat_step_node/i_chat_node.py b/apps/application/flow/step_node/ai_chat_step_node/i_chat_node.py
index be89f35ef2f..15117c0b700 100644
--- a/apps/application/flow/step_node/ai_chat_step_node/i_chat_node.py
+++ b/apps/application/flow/step_node/ai_chat_step_node/i_chat_node.py
@@ -24,7 +24,7 @@ class ChatNodeSerializer(serializers.Serializer):
 
     is_result = serializers.BooleanField(required=False, error_messages=ErrMessage.boolean('是否返回内容'))
 
-    model_params_setting = serializers.DictField(required=True, error_messages=ErrMessage.integer("模型参数相关设置"))
+    model_params_setting = serializers.DictField(required=False, error_messages=ErrMessage.integer("模型参数相关设置"))
 
 
 class IChatNode(INode):
diff --git a/apps/application/flow/step_node/ai_chat_step_node/impl/base_chat_node.py b/apps/application/flow/step_node/ai_chat_step_node/impl/base_chat_node.py
index 3581b5cfd9d..f8ec8a0118d 100644
--- a/apps/application/flow/step_node/ai_chat_step_node/impl/base_chat_node.py
+++ b/apps/application/flow/step_node/ai_chat_step_node/impl/base_chat_node.py
@@ -10,11 +10,14 @@
 from functools import reduce
 from typing import List, Dict
 
+from django.db.models import QuerySet
 from langchain.schema import HumanMessage, SystemMessage
 from langchain_core.messages import BaseMessage
 
 from application.flow.i_step_node import NodeResult, INode
 from application.flow.step_node.ai_chat_step_node.i_chat_node import IChatNode
+from setting.models import Model
+from setting.models_provider import get_model_credential
 from setting.models_provider.tools import get_model_instance_by_model_user_id
 
 
@@ -61,11 +64,20 @@ def write_context(node_variable: Dict, workflow_variable: Dict, node: INode, wor
     _write_context(node_variable, workflow_variable, node, workflow, answer)
 
 
+def get_default_model_params_setting(model_id):
+    model = QuerySet(Model).filter(id=model_id).first()
+    credential = get_model_credential(model.provider, model.model_type, model.model_name)
+    model_params_setting = credential.get_model_params_setting_form(
+        model.model_name).get_default_form_data()
+    return model_params_setting
+
+
 class BaseChatNode(IChatNode):
     def execute(self, model_id, system, prompt, dialogue_number, history_chat_record, stream, chat_id, chat_record_id,
                 model_params_setting,
                 **kwargs) -> NodeResult:
-
+        if model_params_setting is None:
+            model_params_setting = get_default_model_params_setting(model_id)
         chat_model = get_model_instance_by_model_user_id(model_id, self.flow_params_serializer.data.get('user_id'),
                                                          **model_params_setting)
         history_message = self.get_history_message(history_chat_record, dialogue_number)
diff --git a/apps/application/flow/step_node/question_node/i_question_node.py b/apps/application/flow/step_node/question_node/i_question_node.py
index 8fda34a5d78..9b8c125621b 100644
--- a/apps/application/flow/step_node/question_node/i_question_node.py
+++ b/apps/application/flow/step_node/question_node/i_question_node.py
@@ -23,7 +23,7 @@ class QuestionNodeSerializer(serializers.Serializer):
     dialogue_number = serializers.IntegerField(required=True, error_messages=ErrMessage.integer("多轮对话数量"))
 
     is_result = serializers.BooleanField(required=False, error_messages=ErrMessage.boolean('是否返回内容'))
-    model_params_setting = serializers.DictField(required=True, error_messages=ErrMessage.integer("模型参数相关设置"))
+    model_params_setting = serializers.DictField(required=False, error_messages=ErrMessage.integer("模型参数相关设置"))
 
 
 class IQuestionNode(INode):
diff --git a/apps/application/flow/step_node/question_node/impl/base_question_node.py b/apps/application/flow/step_node/question_node/impl/base_question_node.py
index 397a0bfc181..33e1c0fe468 100644
--- a/apps/application/flow/step_node/question_node/impl/base_question_node.py
+++ b/apps/application/flow/step_node/question_node/impl/base_question_node.py
@@ -10,11 +10,14 @@
 from functools import reduce
 from typing import List, Dict
 
+from django.db.models import QuerySet
 from langchain.schema import HumanMessage, SystemMessage
 from langchain_core.messages import BaseMessage
 
 from application.flow.i_step_node import NodeResult, INode
 from application.flow.step_node.question_node.i_question_node import IQuestionNode
+from setting.models import Model
+from setting.models_provider import get_model_credential
 from setting.models_provider.tools import get_model_instance_by_model_user_id
 
 
@@ -61,10 +64,20 @@ def write_context(node_variable: Dict, workflow_variable: Dict, node: INode, wor
     _write_context(node_variable, workflow_variable, node, workflow, answer)
 
 
+def get_default_model_params_setting(model_id):
+    model = QuerySet(Model).filter(id=model_id).first()
+    credential = get_model_credential(model.provider, model.model_type, model.model_name)
+    model_params_setting = credential.get_model_params_setting_form(
+        model.model_name).get_default_form_data()
+    return model_params_setting
+
+
 class BaseQuestionNode(IQuestionNode):
     def execute(self, model_id, system, prompt, dialogue_number, history_chat_record, stream, chat_id, chat_record_id,
                 model_params_setting,
                 **kwargs) -> NodeResult:
+        if model_params_setting is None:
+            model_params_setting = get_default_model_params_setting(model_id)
         chat_model = get_model_instance_by_model_user_id(model_id, self.flow_params_serializer.data.get('user_id'),
                                                          **model_params_setting)
         history_message = self.get_history_message(history_chat_record, dialogue_number)