diff --git a/frontend/src/pages/Workflow/Definition/index.tsx b/frontend/src/pages/Workflow/Definition/index.tsx
index dd3ddb90..548d847e 100644
--- a/frontend/src/pages/Workflow/Definition/index.tsx
+++ b/frontend/src/pages/Workflow/Definition/index.tsx
@@ -215,10 +215,11 @@ const WorkflowDefinitionList: React.FC = () => {
     try {
       console.log('🚀 启动工作流，携带表单数据:', formData);
       
-      // 调用启动API，传递表单数据作为流程变量
+      // 调用启动API，传递表单数据
       const result = await startWorkflowInstance({
         processKey: workflow.key,           // 流程定义key
-        variables: formData,                 // 表单数据作为流程变量
+        formKey: formDefinition?.key,       // 表单标识
+        formData: formData,                  // 表单数据
         businessKey: undefined               // 自动生成 businessKey
       });
       
diff --git a/frontend/src/pages/Workflow/Definition/service.ts b/frontend/src/pages/Workflow/Definition/service.ts
index 6f6a63a0..69519aa2 100644
--- a/frontend/src/pages/Workflow/Definition/service.ts
+++ b/frontend/src/pages/Workflow/Definition/service.ts
@@ -102,7 +102,8 @@ export const startWorkflowInstance = (data: StartWorkflowInstanceRequest) => {
     const requestData: StartWorkflowInstanceRequest = {
         processKey: data.processKey,
         businessKey: data.businessKey || `workflow_${data.processKey}_${Date.now()}`,
-        variables: data.variables || {}
+        formKey: data.formKey,
+        formData: data.formData || {}
     };
     
     return request.post<StartWorkflowInstanceResponse>(`${INSTANCE_URL}/start`, requestData);
diff --git a/frontend/src/pages/Workflow/Definition/types.ts b/frontend/src/pages/Workflow/Definition/types.ts
index fa1006a6..fa1135a2 100644
--- a/frontend/src/pages/Workflow/Definition/types.ts
+++ b/frontend/src/pages/Workflow/Definition/types.ts
@@ -137,8 +137,11 @@ export interface StartWorkflowInstanceRequest {
     /** 业务标识（可选，默认自动生成） */
     businessKey?: string;
     
-    /** 流程变量（表单数据） */
-    variables?: Record<string, any>;
+    /** 表单标识 */
+    formKey?: string;
+    
+    /** 表单数据 */
+    formData?: Record<string, any>;
 }
 
 /**