diff --git a/api/app/core/workflow/nodes/__init__.py b/api/app/core/workflow/nodes/__init__.py
index 820c9301..d143c693 100644
--- a/api/app/core/workflow/nodes/__init__.py
+++ b/api/app/core/workflow/nodes/__init__.py
@@ -4,13 +4,14 @@
 提供各种类型的节点实现，用于工作流执行。
 """
 
-from app.core.workflow.nodes.base_node import BaseNode, WorkflowState
-from app.core.workflow.nodes.llm import LLMNode
 from app.core.workflow.nodes.agent import AgentNode
-from app.core.workflow.nodes.transform import TransformNode
-from app.core.workflow.nodes.start import StartNode
+from app.core.workflow.nodes.base_node import BaseNode, WorkflowState
 from app.core.workflow.nodes.end import EndNode
-from app.core.workflow.nodes.node_factory import NodeFactory
+from app.core.workflow.nodes.if_else import IfElseNode
+from app.core.workflow.nodes.llm import LLMNode
+from app.core.workflow.nodes.node_factory import NodeFactory, WorkflowNode
+from app.core.workflow.nodes.start import StartNode
+from app.core.workflow.nodes.transform import TransformNode
 
 __all__ = [
     "BaseNode",
@@ -18,7 +19,9 @@ __all__ = [
     "LLMNode",
     "AgentNode",
     "TransformNode",
+    "IfElseNode",
     "StartNode",
     "EndNode",
     "NodeFactory",
+    "WorkflowNode"
 ]
diff --git a/api/app/core/workflow/nodes/enums.py b/api/app/core/workflow/nodes/enums.py
index 5e586a9c..af5ddbaa 100644
--- a/api/app/core/workflow/nodes/enums.py
+++ b/api/app/core/workflow/nodes/enums.py
@@ -1,13 +1,4 @@
 from enum import StrEnum
-from typing import Union
-
-from app.core.workflow.nodes.base_node import BaseNode
-from app.core.workflow.nodes.if_else import IfElseNode
-from app.core.workflow.nodes.llm import LLMNode
-from app.core.workflow.nodes.agent import AgentNode
-from app.core.workflow.nodes.transform import TransformNode
-from app.core.workflow.nodes.start import StartNode
-from app.core.workflow.nodes.end import EndNode
 
 
 class NodeType(StrEnum):
@@ -25,12 +16,21 @@ class NodeType(StrEnum):
     AGENT = "agent"
 
 
-WorkflowNode = Union[
-    BaseNode,
-    StartNode,
-    EndNode,
-    LLMNode,
-    IfElseNode,
-    AgentNode,
-    TransformNode,
-]
+class ComparisonOperator(StrEnum):
+    EMPTY = "empty"
+    NOT_EMPTY = "not_empty"
+    CONTAINS = "contains"
+    NOT_CONTAINS = "not_contains"
+    START_WITH = "startwith"
+    END_WITH = "endwith"
+    EQ = "eq"
+    NE = "ne"
+    LT = "lt"
+    LE = "le"
+    GT = "gt"
+    GE = "ge"
+
+
+class LogicOperator(StrEnum):
+    AND = "and"
+    OR = "or"
diff --git a/api/app/core/workflow/nodes/if_else/config.py b/api/app/core/workflow/nodes/if_else/config.py
index 0e759569..4e424b54 100644
--- a/api/app/core/workflow/nodes/if_else/config.py
+++ b/api/app/core/workflow/nodes/if_else/config.py
@@ -1,27 +1,8 @@
 """Condition Configuration"""
 from pydantic import Field, BaseModel, field_validator
-from enum import StrEnum
+
 from app.core.workflow.nodes.base_config import BaseNodeConfig
-
-
-class LogicOperator(StrEnum):
-    AND = "and"
-    OR = "or"
-
-
-class ComparisonOperator(StrEnum):
-    EMPTY = "empty"
-    NOT_EMPTY = "not_empty"
-    CONTAINS = "contains"
-    NOT_CONTAINS = "not_contains"
-    START_WITH = "startwith"
-    END_WITH = "endwith"
-    EQ = "eq"
-    NE = "ne"
-    LT = "lt"
-    LE = "le"
-    GT = "gt"
-    GE = "ge"
+from app.core.workflow.nodes.enums import ComparisonOperator, LogicOperator
 
 
 class ConditionDetail(BaseModel):
@@ -77,7 +58,7 @@ class IfElseNodeConfig(BaseNodeConfig):
                         {
                             "logical_operator": "and",
                             "conditions": [
-                                {
+                                [
                                     {
                                         "left": "node.userinput.message",
                                         "comparison_operator": "eq",
@@ -88,14 +69,14 @@ class IfElseNodeConfig(BaseNodeConfig):
                                         "comparison_operator": "eq",
                                         "right": "True"
                                     }
-                                }
+                                ]
                             ]
                         },
                         # CASE1 / ELIF Branch
                         {
                             "logical_operator": "or",
                             "conditions": [
-                                {
+                                [
                                     {
                                         "left": "node.userinput.test",
                                         "comparison_operator": "eq",
@@ -106,7 +87,7 @@ class IfElseNodeConfig(BaseNodeConfig):
                                         "comparison_operator": "contains",
                                         "right": "'123'"
                                     }
-                                }
+                                ]
                             ]
                         }
                         # CASE3 / ELSE Branch
diff --git a/api/app/core/workflow/nodes/if_else/node.py b/api/app/core/workflow/nodes/if_else/node.py
index fcfbd9ac..ed3dbbd6 100644
--- a/api/app/core/workflow/nodes/if_else/node.py
+++ b/api/app/core/workflow/nodes/if_else/node.py
@@ -1,11 +1,10 @@
 import logging
 from typing import Any
 
-from simpleeval import NameNotDefined, InvalidExpression
-
 from app.core.workflow.nodes import BaseNode, WorkflowState
+from app.core.workflow.nodes.enums import ComparisonOperator
 from app.core.workflow.nodes.if_else import IfElseNodeConfig
-from app.core.workflow.nodes.if_else.config import LogicOperator, ConditionDetail, ComparisonOperator
+from app.core.workflow.nodes.if_else.config import ConditionDetail
 
 logger = logging.getLogger(__name__)
 
diff --git a/api/app/core/workflow/nodes/node_factory.py b/api/app/core/workflow/nodes/node_factory.py
index e1f32308..1abace67 100644
--- a/api/app/core/workflow/nodes/node_factory.py
+++ b/api/app/core/workflow/nodes/node_factory.py
@@ -5,19 +5,29 @@
 """
 
 import logging
-from typing import Any
+from typing import Any, Union
 
+from app.core.workflow.nodes.agent import AgentNode
 from app.core.workflow.nodes.base_node import BaseNode
-from app.core.workflow.nodes.enums import NodeType, WorkflowNode
+from app.core.workflow.nodes.end import EndNode
+from app.core.workflow.nodes.enums import NodeType
 from app.core.workflow.nodes.if_else import IfElseNode
 from app.core.workflow.nodes.llm import LLMNode
-from app.core.workflow.nodes.agent import AgentNode
-from app.core.workflow.nodes.transform import TransformNode
 from app.core.workflow.nodes.start import StartNode
-from app.core.workflow.nodes.end import EndNode
+from app.core.workflow.nodes.transform import TransformNode
 
 logger = logging.getLogger(__name__)
 
+WorkflowNode = Union[
+    BaseNode,
+    StartNode,
+    EndNode,
+    LLMNode,
+    IfElseNode,
+    AgentNode,
+    TransformNode,
+]
+
 
 class NodeFactory:
     """节点工厂
@@ -54,9 +64,9 @@ class NodeFactory:
 
     @classmethod
     def create_node(
-        cls,
-        node_config: dict[str, Any],
-        workflow_config: dict[str, Any]
+            cls,
+            node_config: dict[str, Any],
+            workflow_config: dict[str, Any]
     ) -> WorkflowNode | None:
         """创建节点实例