diff --git a/backend/routes/process-templates.js b/backend/routes/process-templates.js
index 10a5042..31ccf15 100644
--- a/backend/routes/process-templates.js
+++ b/backend/routes/process-templates.js
@@ -57,9 +57,6 @@ router.put('/:id', async (req, res) => {
     if (existing.rows.length === 0) {
       return res.status(404).json({ success: false, message: '模板不存在' });
     }
-    if (existing.rows[0].is_system) {
-      return res.status(403).json({ success: false, message: '系统预设模板不可修改' });
-    }
     const { name, description, phases } = req.body;
     const updates = [];
     const values = [];
diff --git a/frontend/src/components/layout/MainLayout.tsx b/frontend/src/components/layout/MainLayout.tsx
index c34e936..b231be8 100644
--- a/frontend/src/components/layout/MainLayout.tsx
+++ b/frontend/src/components/layout/MainLayout.tsx
@@ -252,6 +252,13 @@ const MainLayout: React.FC = () => {
       icon: <SettingOutlined />,
       label: '系统设置'
     },
+    ...(user?.role === 'admin' ? [{
+      type: 'divider' as const
+    }, {
+      key: '/admin',
+      icon: <SettingOutlined />,
+      label: '后台管理'
+    }] : []),
     {
       type: 'divider' as const
     },
diff --git a/frontend/src/pages/admin/ProcessTemplates.tsx b/frontend/src/pages/admin/ProcessTemplates.tsx
index 56f95d6..62177b7 100644
--- a/frontend/src/pages/admin/ProcessTemplates.tsx
+++ b/frontend/src/pages/admin/ProcessTemplates.tsx
@@ -37,6 +37,7 @@ const ProcessTemplates: React.FC = () => {
   const [phaseDrawerVisible, setPhaseDrawerVisible] = useState(false);
   const [editingPhaseIndex, setEditingPhaseIndex] = useState<number>(-1);
   const [phaseForm] = Form.useForm();
+  const [editingTemplateId, setEditingTemplateId] = useState<number | null>(null);
 
   useEffect(() => { fetchTemplates(); }, []);
 
@@ -53,6 +54,15 @@ const ProcessTemplates: React.FC = () => {
     form.resetFields();
     setPhases([]);
     setCurrentStep(0);
+    setEditingTemplateId(null);
+    setCreateModalVisible(true);
+  };
+
+  const handleEdit = (t: Template) => {
+    form.setFieldsValue({ name: t.name, description: t.description });
+    setPhases(t.phases || []);
+    setCurrentStep(1);
+    setEditingTemplateId(t.id);
     setCreateModalVisible(true);
   };
 
@@ -83,11 +93,17 @@ const ProcessTemplates: React.FC = () => {
       const description = form.getFieldValue('description');
       if (!name) { message.warning('请输入模板名称'); setCurrentStep(0); return; }
       if (phases.length === 0) { message.warning('请至少添加一个阶段'); setCurrentStep(1); return; }
-      await apiClient.post('/process-templates', { name, description, phases });
-      message.success('模板创建成功');
+      if (editingTemplateId) {
+        await apiClient.put(`/process-templates/${editingTemplateId}`, { name, description, phases });
+        message.success('模板更新成功');
+      } else {
+        await apiClient.post('/process-templates', { name, description, phases });
+        message.success('模板创建成功');
+      }
       setCreateModalVisible(false);
+      setEditingTemplateId(null);
       fetchTemplates();
-    } catch (e) { message.error('创建失败'); }
+    } catch (e) { message.error('保存失败'); }
   };
 
   const addPhase = () => {
@@ -162,6 +178,7 @@ const ProcessTemplates: React.FC = () => {
     { title: '操作', key: 'action', render: (_: unknown, r: Template) => (
       <Space>
         <Button size="small" icon={<EyeOutlined />} onClick={() => handleView(r)}>查看</Button>
+        <Button size="small" type="primary" icon={<EditOutlined />} onClick={() => handleEdit(r)}>编辑</Button>
         <Button size="small" icon={<CopyOutlined />} onClick={() => handleCopy(r)}>复制</Button>
         {!r.is_system && <Popconfirm title="确定删除？" onConfirm={() => handleDelete(r.id)}><Button size="small" danger icon={<DeleteOutlined />}>删除</Button></Popconfirm>}
       </Space>
@@ -174,14 +191,14 @@ const ProcessTemplates: React.FC = () => {
         <Table columns={columns} dataSource={templates} rowKey="id" loading={loading} pagination={false} />
       </Card>
 
-      <Modal title="新建工程模板" open={createModalVisible} onCancel={() => setCreateModalVisible(false)} width={800} footer={[
+      <Modal title={editingTemplateId ? "编辑工程模板" : "新建工程模板"} open={createModalVisible} onCancel={() => setCreateModalVisible(false)} width={800} footer={[
         <Button key="cancel" onClick={() => setCreateModalVisible(false)}>取消</Button>,
         currentStep > 0 && <Button key="prev" onClick={() => setCurrentStep(currentStep - 1)}>上一步</Button>,
         currentStep < 2 && <Button key="next" type="primary" onClick={() => {
           if (currentStep === 0 && !form.getFieldValue('name')) { message.warning('请输入模板名称'); return; }
           setCurrentStep(currentStep + 1);
         }}>下一步</Button>,
-        currentStep === 2 && <Button key="save" type="primary" onClick={handleSaveTemplate}>确认创建</Button>,
+        currentStep === 2 && <Button key="save" type="primary" onClick={handleSaveTemplate}>{editingTemplateId ? '保存修改' : '确认创建'}</Button>,
       ]}>
         <Steps current={currentStep} size="small" style={{ marginBottom: 24 }}>
           <Steps.Step title="基本信息" />