diff --git a/src/views/workflow/extension/form/helper/WorkflowFormDesign.vue b/src/views/workflow/extension/form/helper/WorkflowFormDesign.vue
index 720a9fd..0dc8a7b 100644
--- a/src/views/workflow/extension/form/helper/WorkflowFormDesign.vue
+++ b/src/views/workflow/extension/form/helper/WorkflowFormDesign.vue
@@ -82,7 +82,7 @@
       case 'edit':
         props.title = '编辑流程表单';
         state.form = await getFormDefinitionJson(id);
-        state.form.json && (formDesignProps.options = state.form.json);
+        state.form?.json && (formDesignProps.options = state.form.json);
         break;
     }
     setModalProps(props);