diff --git a/soong_workflow/models/soong_workflow_node.py b/soong_workflow/models/soong_workflow_node.py
index 71ffa25c7..0e06899e9 100644
--- a/soong_workflow/models/soong_workflow_node.py
+++ b/soong_workflow/models/soong_workflow_node.py
@@ -107,6 +107,7 @@ class SoongWorkflowNode(models.Model):
         ('next', '跳过下一个相同人员节点'),
         ('prev', '跳过上一个相同人员节点'),
     ], string='相同人员节点处理', default='none')
+    is_mandatory_node = fields.Boolean(string="必经节点", default=False)
 
     @api.onchange("is_apostille")
     def onchange_is_apostille(self):
diff --git a/soong_workflow/views/soong_workflow_node_views.xml b/soong_workflow/views/soong_workflow_node_views.xml
index 11a668c0f..82f6f1de2 100644
--- a/soong_workflow/views/soong_workflow_node_views.xml
+++ b/soong_workflow/views/soong_workflow_node_views.xml
@@ -17,6 +17,7 @@
                             <field name="return_comment_id"/>
                             <field name="confirm_comment_id"/>
                             <field name="end_comment_id"/>
+                            <field name="is_mandatory_node"/>
                             <field name="same_user_skip_type"/>
                             <field name="illustrate"/>
                         </group>
diff --git a/soong_workflow/wizard/soong_workflow_comment_wizard.py b/soong_workflow/wizard/soong_workflow_comment_wizard.py
index 43a71bdfc..7ada98a92 100644
--- a/soong_workflow/wizard/soong_workflow_comment_wizard.py
+++ b/soong_workflow/wizard/soong_workflow_comment_wizard.py
@@ -206,13 +206,45 @@ class SoongWorkflowCommentWizard(models.TransientModel):
     @api.onchange('trans_link_id')
     def onchange_trans_employee_ids(self):
         for record in self:
+            record_id = self.env[record.res_model].browse(record.res_id) if record.res_model and record.res_id else None
+            ctx_links = self.env.context.get('all_workflow_links', [])
+            all_links = self.env['trans.link'].browse(ctx_links) if isinstance(ctx_links, (list, tuple)) else ctx_links
+
+            valid_links = all_links - record.invalid_link_ids
+
             record.is_selection = False
             record.is_this_company = True
             if record.node_btn_id.employee_ids and record.node_btn_id.is_carbon_copy:
                 record.circulated_employee_ids = record.node_btn_id.employee_ids
+
+            if not record_id or not record_id.workflow_id:
+                continue
+            # 排除规则：存在 node_btn_name == '1' 直接放行不限制
+            has_exclude_log = record_id.log_ids.filtered(lambda l: l.node_btn_name == '1')
+            if has_exclude_log:
+                continue
+            # 1. 拿到所有必经节点
+            mandatory_nodes = record_id.workflow_id.node_ids.filtered(lambda n: n.is_mandatory_node)
+            if not mandatory_nodes:
+                return
+            # 取第一个必经节点
+            first_mandatory_node = mandatory_nodes[0]
+            # 2. 只允许选择：顺序 <= 必经节点的链接
+            allow_links = self.env['trans.link']
+            for link in valid_links:
+                link_node = record_id.workflow_id.node_ids.search([
+                    ('name', '=', link.name),
+                    ('workflow_id', '=', record_id.workflow_id.id)
+                ], limit=1)
+                if link_node and link_node.sequence <= first_mandatory_node.sequence:
+                    allow_links |= link
+
+            if record.trans_link_id and record.trans_link_id not in allow_links:
+                record.trans_link_id = False
+                raise UserError(f"节点【{first_mandatory_node.name}】是必经节点，不可选择必经节点之后的流程节点！")
+
             if not record.trans_link_id:
                 continue
-            record_id = self.env[record.res_model].browse(record.res_id) if record.res_model and record.res_id else None
             for link in record.trans_link_id:
                 employee_user_role_ids = self.env['hr.employee']
                 if link.name == '印章管理员':
diff --git a/yuthon_notice/models/yuthon_notice.py b/yuthon_notice/models/yuthon_notice.py
index b60847d06..02ee5b840 100644
--- a/yuthon_notice/models/yuthon_notice.py
+++ b/yuthon_notice/models/yuthon_notice.py
@@ -237,7 +237,6 @@ class YuthonNotice(models.Model):
                     ('notice_code', '=', self.code),
                     ('employee_id', '=', emp_id)
                 ], limit=1)
-
                 if not is_exist:
                     self.env['yuthon.confirm.users'].sudo().create({
                         'notice_id': self.id,