diff --git a/furniture-3d-system/src/server/services/__tests__/intake-owner-options.service.test.ts b/furniture-3d-system/src/server/services/__tests__/intake-owner-options.service.test.ts
index ccafba64..2c444375 100644
--- a/furniture-3d-system/src/server/services/__tests__/intake-owner-options.service.test.ts
+++ b/furniture-3d-system/src/server/services/__tests__/intake-owner-options.service.test.ts
@@ -153,4 +153,28 @@ describe('intake-owner-options.service', () => {
       listIntakeOwnerOptionNamesByDepartmentScope('merchandisePlanning'),
     ).resolves.toEqual(['内部A'])
   })
+
+  it('excludes supplier accounts from merchandise planning candidates', async () => {
+    mockedFindMany.mockResolvedValue([
+      {
+        name: '兰考华兰家具',
+        businessRoles: ['SUPPLIER'],
+        department: null,
+        team: null,
+      },
+      {
+        name: '内部A',
+        businessRoles: [],
+        department: {
+          name: '产品研发部',
+          fullPath: '江苏简尚品牌管理有限公司 > 产品研发部',
+        },
+        team: null,
+      },
+    ])
+
+    await expect(
+      listIntakeOwnerOptionNamesByDepartmentScope('merchandisePlanning'),
+    ).resolves.toEqual(['内部A'])
+  })
 })
diff --git a/furniture-3d-system/src/server/services/intake-owner-options.service.ts b/furniture-3d-system/src/server/services/intake-owner-options.service.ts
index eb3974d6..37a1e7db 100644
--- a/furniture-3d-system/src/server/services/intake-owner-options.service.ts
+++ b/furniture-3d-system/src/server/services/intake-owner-options.service.ts
@@ -119,8 +119,12 @@ export async function listIntakeOwnerOptionNamesByDepartmentScope(
 
       if (isOptionExternalIntakeUser) return false;
 
+      // 供应商自注册账号（SUPPLIER 角色）不是内部人员，
+      // 不应出现在任何内部负责人候选里。
+      if (user.businessRoles?.includes("SUPPLIER")) return false;
+
       // 商品企划部已解散（2026-10 用户口径）：商品企划不再按部门圈定候选人，
-      // 直接开放为全部内部人员可搜索填写；外部人员已在上面排除。
+      // 直接开放为全部内部人员可搜索填写；外部人员与供应商已在上面排除。
       if (scope === "merchandisePlanning") {
         return true;
       }