diff --git a/frontend/src/pages/Workflow/Instance/types.ts b/frontend/src/pages/Workflow/Instance/types.ts
index 6e06c1e1..e4ff71ad 100644
--- a/frontend/src/pages/Workflow/Instance/types.ts
+++ b/frontend/src/pages/Workflow/Instance/types.ts
@@ -1,4 +1,4 @@
-import { Page, BaseQuery } from '@/types/base';
+import { BaseQuery } from '@/types/base';
 
 export interface WorkflowTemplateWithInstances {
     id: number;
@@ -22,6 +22,40 @@ export interface WorkflowInstanceStage {
     endTime: string | null;
 }
 
+export interface WorkflowGraphNode {
+    id: string;
+    nodeCode: string;
+    nodeType: string;
+    nodeName: string;
+    position: {
+        x: number;
+        y: number;
+    };
+    configs: Record<string, any>;
+    inputMapping: Record<string, any>;
+    outputs: any[];
+}
+
+export interface WorkflowGraphEdge {
+    id: string;
+    from: string;
+    to: string;
+    name: string;
+    config: {
+        type: string;
+        condition: {
+            type: string;
+            priority: number;
+        };
+    };
+    vertices: any[];
+}
+
+export interface WorkflowGraph {
+    nodes: WorkflowGraphNode[];
+    edges: WorkflowGraphEdge[];
+}
+
 export interface WorkflowHistoricalInstance {
     id: number;
     processInstanceId: string;
@@ -31,6 +65,7 @@ export interface WorkflowHistoricalInstance {
     startTime: string;
     endTime: string | null;
     stages: WorkflowInstanceStage[];
+    graph?: WorkflowGraph;
 }
 
 export interface WorkflowHistoricalInstanceQuery extends BaseQuery {