diff --git a/src/main/java/xyz/playedu/api/controller/backend/CourseUserController.java b/src/main/java/xyz/playedu/api/controller/backend/CourseUserController.java
index 600eaee..c2e9cb5 100644
--- a/src/main/java/xyz/playedu/api/controller/backend/CourseUserController.java
+++ b/src/main/java/xyz/playedu/api/controller/backend/CourseUserController.java
@@ -16,6 +16,7 @@
 package xyz.playedu.api.controller.backend;
 
 import lombok.SneakyThrows;
+import lombok.extern.slf4j.Slf4j;
 
 import org.apache.commons.collections4.MapUtils;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -49,6 +50,7 @@ import java.util.stream.Collectors;
  * @create 2023/3/24 16:08
  */
 @RestController
+@Slf4j
 @RequestMapping("/backend/v1/course/{courseId}/user")
 public class CourseUserController {
 
@@ -86,8 +88,7 @@ public class CourseUserController {
         // 所属部门
         List<Integer> depIds = courseService.getDepIdsByCourseId(courseId);
         if (depIds != null && depIds.size() > 0) {
-            filter.setDepIds(
-                    depIds.stream().map(String::valueOf).collect(Collectors.joining(",", "", "")));
+            filter.setDepIds(depIds);
         }
 
         PaginationResult<User> result = userService.paginate(page, size, filter);
diff --git a/src/main/java/xyz/playedu/api/controller/backend/DepartmentController.java b/src/main/java/xyz/playedu/api/controller/backend/DepartmentController.java
index 16c7b2b..e08c54a 100644
--- a/src/main/java/xyz/playedu/api/controller/backend/DepartmentController.java
+++ b/src/main/java/xyz/playedu/api/controller/backend/DepartmentController.java
@@ -188,7 +188,12 @@ public class DepartmentController {
         String name = MapUtils.getString(params, "name");
         String email = MapUtils.getString(params, "email");
         String idCard = MapUtils.getString(params, "id_card");
-        String depIds = String.valueOf(id);
+        List<Integer> depIds =
+                new ArrayList<>() {
+                    {
+                        add(id);
+                    }
+                };
 
         String courseIdsStr = MapUtils.getString(params, "course_ids");
         String showMode = MapUtils.getString(params, "show_mode");
diff --git a/src/main/java/xyz/playedu/api/controller/backend/UserController.java b/src/main/java/xyz/playedu/api/controller/backend/UserController.java
index 5de663f..a05335b 100644
--- a/src/main/java/xyz/playedu/api/controller/backend/UserController.java
+++ b/src/main/java/xyz/playedu/api/controller/backend/UserController.java
@@ -99,8 +99,17 @@ public class UserController {
         Integer isVerify = MapUtils.getInteger(params, "is_verify");
         Integer isSetPassword = MapUtils.getInteger(params, "is_set_password");
         String createdAt = MapUtils.getString(params, "created_at");
-        String depIds = MapUtils.getString(params, "dep_ids");
+        String depIdsStr = MapUtils.getString(params, "dep_ids");
+        List<Integer> depIds = null;
+        if (depIdsStr != null && depIdsStr.trim().length() > 0) {
+            if ("0".equals(depIdsStr)) {
+                depIds = new ArrayList<>();
+            } else {
+                depIds = Arrays.stream(depIdsStr.split(",")).map(Integer::valueOf).toList();
+            }
+        }
 
+        List<Integer> finalDepIds = depIds;
         UserPaginateFilter filter =
                 new UserPaginateFilter() {
                     {
@@ -111,7 +120,7 @@ public class UserController {
                         setIsLock(isLock);
                         setIsVerify(isVerify);
                         setIsSetPassword(isSetPassword);
-                        setDepIds(depIds);
+                        setDepIds(finalDepIds);
                         setSortAlgo(sortAlgo);
                         setSortField(sortField);
                     }
diff --git a/src/main/java/xyz/playedu/api/types/paginate/UserPaginateFilter.java b/src/main/java/xyz/playedu/api/types/paginate/UserPaginateFilter.java
index 990785c..d548249 100644
--- a/src/main/java/xyz/playedu/api/types/paginate/UserPaginateFilter.java
+++ b/src/main/java/xyz/playedu/api/types/paginate/UserPaginateFilter.java
@@ -17,6 +17,8 @@ package xyz.playedu.api.types.paginate;
 
 import lombok.Data;
 
+import java.util.List;
+
 /**
  * @Author 杭州白书科技有限公司
  *
@@ -36,7 +38,7 @@ public class UserPaginateFilter {
     // 创建时间范围过滤
     private String[] createdAt;
 
-    private String depIds;
+    private List<Integer> depIds;
 
     // 排序控制
     private String sortField;
diff --git a/src/main/resources/mapper/UserMapper.xml b/src/main/resources/mapper/UserMapper.xml
index cc0474b..f72f9ae 100644
--- a/src/main/resources/mapper/UserMapper.xml
+++ b/src/main/resources/mapper/UserMapper.xml
@@ -36,24 +36,23 @@
     <select id="paginateCount" resultType="java.lang.Long">
         SELECT count(1)
         FROM `users`
-        <if test="depIds != null and depIds != ''">
-            <choose>
-                <when test="depIds.indexOf('0') == 0">
-                    LEFT JOIN `user_department` ON `user_department`.`user_id` = `users`.`id`
-                </when>
-                <otherwise>
-                    INNER JOIN `user_department` ON `user_department`.`user_id` = `users`.`id`
-                </otherwise>
-            </choose>
-        </if>
         <where>
-            <if test="depIds != null and depIds != ''">
+            <if test="depIds != null">
                 <choose>
-                    <when test="depIds.indexOf('0') == 0">
-                        AND `user_department`.`user_id` IS NULL
+                    <when test="depIds.size == 0">
+                        AND `users`.`id` IN (
+                        SELECT `users`.`id` from `users` LEFT JOIN `user_department` ON `user_department`.`user_id` =
+                        `users`.`id`
+                        WHERE `user_department`.`user_id` IS NULL
+                        )
                     </when>
                     <otherwise>
-                        AND `user_department`.`dep_id` IN (#{depIds})
+                        AND `users`.`id` IN (
+                        SELECT `users`.`id` from `users` LEFT JOIN `user_department` ON `user_department`.`user_id` =
+                        `users`.`id`
+                        WHERE `user_department`.`dep_id` IN (<foreach collection="depIds" item="depId" separator=",">
+                        #{depId}</foreach>)
+                        )
                     </otherwise>
                 </choose>
             </if>
@@ -78,7 +77,7 @@
             <if test="isSetPassword != null">
                 AND `users`.`is_set_password` = #{isSetPassword}
             </if>
-            <if test="createdAt != null">
+            <if test="createdAt != null and createdAt.size == 2">
                 AND `users`.`created_at` BETWEEN
                 <foreach collection="createdAt" item="createdAtItem" separator=" AND ">#{createdAtItem}</foreach>
             </if>
@@ -88,24 +87,23 @@
     <select id="paginate" resultType="xyz.playedu.api.domain.User">
         SELECT `users`.*
         FROM `users`
-        <if test="depIds != null and depIds != ''">
-            <choose>
-                <when test="depIds.indexOf('0') == 0">
-                    LEFT JOIN `user_department` ON `user_department`.`user_id` = `users`.`id`
-                </when>
-                <otherwise>
-                    INNER JOIN `user_department` ON `user_department`.`user_id` = `users`.`id`
-                </otherwise>
-            </choose>
-        </if>
         <where>
-            <if test="depIds != null and depIds != ''">
+            <if test="depIds != null">
                 <choose>
-                    <when test="depIds.indexOf('0') == 0">
-                        AND `user_department`.`user_id` IS NULL
+                    <when test="depIds.size == 0">
+                        AND `users`.`id` IN (
+                        SELECT `users`.`id` from `users` LEFT JOIN `user_department` ON `user_department`.`user_id` =
+                        `users`.`id`
+                        WHERE `user_department`.`user_id` IS NULL
+                        )
                     </when>
                     <otherwise>
-                        AND `user_department`.`dep_id` IN (#{depIds})
+                        AND `users`.`id` IN (
+                        SELECT `users`.`id` from `users` LEFT JOIN `user_department` ON `user_department`.`user_id` =
+                        `users`.`id`
+                        WHERE `user_department`.`dep_id` IN (<foreach collection="depIds" item="depId" separator=",">
+                        #{depId}</foreach>)
+                        )
                     </otherwise>
                 </choose>
             </if>
@@ -130,7 +128,7 @@
             <if test="isSetPassword != null">
                 AND `users`.`is_set_password` = #{isSetPassword}
             </if>
-            <if test="createdAt != null">
+            <if test="createdAt != null and createdAt.size == 2">
                 AND `users`.`created_at` BETWEEN
                 <foreach collection="createdAt" item="createdAtItem" separator=" AND ">#{createdAtItem}</foreach>
             </if>