diff --git a/jeecg-module-system/jeecg-system-api/jeecg-system-cloud-api/src/main/java/org/jeecg/common/system/api/ISysBaseAPI.java b/jeecg-module-system/jeecg-system-api/jeecg-system-cloud-api/src/main/java/org/jeecg/common/system/api/ISysBaseAPI.java
index d23a691..2eb36c5 100644
--- a/jeecg-module-system/jeecg-system-api/jeecg-system-cloud-api/src/main/java/org/jeecg/common/system/api/ISysBaseAPI.java
+++ b/jeecg-module-system/jeecg-system-api/jeecg-system-cloud-api/src/main/java/org/jeecg/common/system/api/ISysBaseAPI.java
@@ -78,6 +78,15 @@ public interface ISysBaseAPI extends CommonAPI {
     @GetMapping("/sys/api/getUserById")
     LoginUser getUserById(@RequestParam("id") String id);
 
+    /**
+     * 查询角色下未逻辑删除用户的登录用户名，供流程多实例任务分配使用。
+     *
+     * @param roleId 系统角色 ID
+     * @return 用户名列表
+     */
+    @GetMapping("/sys/api/getUsernamesByRoleId")
+    List<String> getUsernamesByRoleIdLocalApi(@RequestParam("roleId") String roleId);
+
     /**
      * 7通过用户账号查询角色集合
      * @param username
diff --git a/jeecg-module-system/jeecg-system-biz/src/main/java/org/jeecg/modules/api/controller/SystemApiController.java b/jeecg-module-system/jeecg-system-biz/src/main/java/org/jeecg/modules/api/controller/SystemApiController.java
index 4fffe7c..354bcd4 100644
--- a/jeecg-module-system/jeecg-system-biz/src/main/java/org/jeecg/modules/api/controller/SystemApiController.java
+++ b/jeecg-module-system/jeecg-system-biz/src/main/java/org/jeecg/modules/api/controller/SystemApiController.java
@@ -131,6 +131,14 @@ public class SystemApiController {
         return loginUser;
     }
 
+    /**
+     * 流程多实例节点只接受 username 作为办理人标识，统一由系统服务按角色查询。
+     */
+    @GetMapping("/getUsernamesByRoleId")
+    List<String> getUsernamesByRoleId(@RequestParam("roleId") String roleId) {
+        return sysBaseApi.getUsernamesByRoleIdLocalApi(roleId);
+    }
+
     /**
      * 通过用户账号查询角色集合
      * @param username