diff --git a/src/main/java/com/yunhai/flowcenter/controller/api/FlowAdminController.java b/src/main/java/com/yunhai/flowcenter/controller/api/FlowAdminController.java
index 71bfbe2..db6fa97 100644
--- a/src/main/java/com/yunhai/flowcenter/controller/api/FlowAdminController.java
+++ b/src/main/java/com/yunhai/flowcenter/controller/api/FlowAdminController.java
@@ -138,6 +138,14 @@ public class FlowAdminController {
         return mapAdminService.importGroups(adminGuard.requireAdmin(user, null));
     }
 
+    // ==================== 选人组件数据源 ====================
+
+    /** 选人组件树：学校组树（组→组内用户叶子），管理端「选择用户」弹窗共用 */
+    @GetMapping("/user/tree")
+    public List<FlowMapAdminService.SelectUserNodeVo> userTree(BoaUser user) {
+        return mapAdminService.userTree(adminGuard.requireAdmin(user, null));
+    }
+
     // ==================== 回调注册/推送日志/死信 ====================
 
     @GetMapping("/callback/regList")
diff --git a/src/main/java/com/yunhai/flowcenter/service/FlowMapAdminService.java b/src/main/java/com/yunhai/flowcenter/service/FlowMapAdminService.java
index 641c23d..316bfdb 100644
--- a/src/main/java/com/yunhai/flowcenter/service/FlowMapAdminService.java
+++ b/src/main/java/com/yunhai/flowcenter/service/FlowMapAdminService.java
@@ -17,6 +17,7 @@ import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 
 /**
@@ -92,6 +93,65 @@ public class FlowMapAdminService {
         }
     }
 
+    // ==================== 选人组件数据源 ====================
+
+    /** 选人组件树节点：组=isParent(true)+children；用户=叶子(isParent 缺省 false) */
+    @Getter
+    @Setter
+    public static class SelectUserNodeVo {
+        private Integer id;
+        private String name;
+        private Boolean isParent;
+        private List<SelectUserNodeVo> children = new ArrayList<>();
+    }
+
+    /**
+     * 学校组树（组→组内用户叶子），供管理端「选择用户」弹窗（多选指定用户/单选映射办理人）。
+     * 与 {@link #previewGroupDepts(Long)} 同源：UserBase getGroupById(schId, withSub) 子树 + 逐组挂成员。
+     */
+    public List<SelectUserNodeVo> userTree(Long schId) {
+        BoaGroup subtree;
+        try {
+            subtree = groupClient.getGroupById(schId.intValue(), true);
+        } catch (Exception e) {
+            throw new BizException(ErrorCode.PARAM_ERROR, "UserBase 组树不可达：" + e.getMessage());
+        }
+        if (subtree == null || subtree.getId() == null) {
+            throw new BizException(ErrorCode.PARAM_ERROR, "学校组不存在（schId=" + schId + "）");
+        }
+        return Collections.singletonList(groupNode(subtree));
+    }
+
+    /** 组节点：先挂用户叶子再递归子组；isParent=UserBase 已宣告子组，防"空组"被当作用户叶子 */
+    private SelectUserNodeVo groupNode(BoaGroup group) {
+        SelectUserNodeVo vo = new SelectUserNodeVo();
+        vo.setId(group.getId());
+        vo.setName(group.getName());
+        boolean declaredSub = group.getChildren() != null && !group.getChildren().isEmpty();
+        try {
+            List<BoaUser> members = groupClient.getGroupUsers(group.getId(), false, null);
+            if (members != null) {
+                for (BoaUser u : members) {
+                    if (u != null && u.getId() != null) {
+                        SelectUserNodeVo leaf = new SelectUserNodeVo();
+                        leaf.setId(u.getId());
+                        leaf.setName(u.getName() == null ? "" : u.getName());
+                        vo.getChildren().add(leaf);
+                    }
+                }
+            }
+        } catch (Exception e) {
+            log.warn("[flow-center] 组成员拉取失败(groupId={}, name={})：{}", group.getId(), group.getName(), e.getMessage());
+        }
+        for (BoaGroup child : group.getChildren() == null ? Collections.<BoaGroup>emptyList() : group.getChildren()) {
+            if (child != null && child.getId() != null) {
+                vo.getChildren().add(groupNode(child));
+            }
+        }
+        vo.setIsParent(declaredSub || !vo.getChildren().isEmpty());
+        return vo;
+    }
+
     // ==================== 一键拉取教师组 ====================
 
     /** 科室预览/导入项（deptKey=UserBase 组 id） */