diff --git a/manager/src/main/java/org/jiayunet/controller/JobCategoryController.java b/manager/src/main/java/org/jiayunet/controller/JobCategoryController.java
new file mode 100644
index 0000000..81595d5
--- /dev/null
+++ b/manager/src/main/java/org/jiayunet/controller/JobCategoryController.java
@@ -0,0 +1,50 @@
+package org.jiayunet.controller;
+
+import org.jiayunet.pojo.vo.JobCategoryTreeVo;
+import org.jiayunet.pojo.vo.JobCategoryVo;
+import org.jiayunet.service.JobCategoryService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.List;
+
+/**
+ * 岗位分类接口
+ *
+ * @author zk
+ */
+@RestController
+@RequestMapping("/job-categories")
+public class JobCategoryController {
+    @Autowired
+    private JobCategoryService categoryService;
+
+    /**
+     * 获取全部岗位分类树（一级-二级-三级嵌套）
+     */
+    @GetMapping("/tree")
+    public List<JobCategoryTreeVo> getCategoryTree() {
+        return categoryService.getCategoryTree();
+    }
+
+    /**
+     * 按父级查询岗位分类列表
+     * @param parentId 父级ID，不传=查一级
+     */
+    @GetMapping
+    public List<JobCategoryVo> getCategoriesByParent(@RequestParam(required = false) Long parentId) {
+        return categoryService.getCategoriesByParent(parentId);
+    }
+
+    /**
+     * 模糊搜索岗位分类
+     * @param keyword 分类名关键字
+     */
+    @GetMapping("/search")
+    public List<JobCategoryVo> searchCategories(@RequestParam String keyword) {
+        return categoryService.searchCategories(keyword);
+    }
+}
diff --git a/manager/src/main/java/org/jiayunet/pojo/vo/JobCategoryTreeVo.java b/manager/src/main/java/org/jiayunet/pojo/vo/JobCategoryTreeVo.java
new file mode 100644
index 0000000..f6b977f
--- /dev/null
+++ b/manager/src/main/java/org/jiayunet/pojo/vo/JobCategoryTreeVo.java
@@ -0,0 +1,22 @@
+package org.jiayunet.pojo.vo;
+
+import lombok.Data;
+
+import java.util.List;
+
+/**
+ * 岗位分类树形VO
+ *
+ * @author zk
+ */
+@Data
+public class JobCategoryTreeVo {
+    /** 分类ID */
+    private Long id;
+    /** 分类名称 */
+    private String name;
+    /** 层级 */
+    private Integer level;
+    /** 子级分类列表 */
+    private List<JobCategoryTreeVo> children;
+}
diff --git a/manager/src/main/java/org/jiayunet/pojo/vo/JobCategoryVo.java b/manager/src/main/java/org/jiayunet/pojo/vo/JobCategoryVo.java
new file mode 100644
index 0000000..b52904e
--- /dev/null
+++ b/manager/src/main/java/org/jiayunet/pojo/vo/JobCategoryVo.java
@@ -0,0 +1,20 @@
+package org.jiayunet.pojo.vo;
+
+import lombok.Data;
+
+/**
+ * 岗位分类VO（平铺结构）
+ *
+ * @author zk
+ */
+@Data
+public class JobCategoryVo {
+    /** 分类ID */
+    private Long id;
+    /** 分类名称 */
+    private String name;
+    /** 层级 */
+    private Integer level;
+    /** 父级ID */
+    private Long parentId;
+}
diff --git a/manager/src/main/java/org/jiayunet/service/JobCategoryService.java b/manager/src/main/java/org/jiayunet/service/JobCategoryService.java
new file mode 100644
index 0000000..19d08d8
--- /dev/null
+++ b/manager/src/main/java/org/jiayunet/service/JobCategoryService.java
@@ -0,0 +1,102 @@
+package org.jiayunet.service;
+
+import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
+import lombok.extern.slf4j.Slf4j;
+import org.jiayunet.mapper.JobCategoryMapper;
+import org.jiayunet.pojo.po.JobCategory;
+import org.jiayunet.pojo.vo.JobCategoryTreeVo;
+import org.jiayunet.pojo.vo.JobCategoryVo;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+/**
+ * 岗位分类服务
+ * <p>主要功能：岗位分类数据查询（树形、层级、搜索）</p>
+ * <p>依赖：无</p>
+ * <p>使用表：bg_job_category</p>
+ *
+ * @author zk
+ */
+@Slf4j
+@Service
+public class JobCategoryService {
+    @Autowired
+    private JobCategoryMapper categoryMapper;
+
+    /**
+     * 获取全部岗位分类树（一级-二级-三级嵌套）
+     * <p>1. 查询全部分类 2. 按level分组 3. 构建三层树</p>
+     */
+    public List<JobCategoryTreeVo> getCategoryTree() {
+        List<JobCategory> allCategories = categoryMapper.selectList(null);
+        List<JobCategory> level1 = allCategories.stream().filter(c -> c.getLevel() == 1).collect(Collectors.toList());
+        Map<Long, List<JobCategory>> level2ByParent = allCategories.stream().filter(c -> c.getLevel() == 2).collect(Collectors.groupingBy(JobCategory::getParentId));
+        Map<Long, List<JobCategory>> level3ByParent = allCategories.stream().filter(c -> c.getLevel() == 3).collect(Collectors.groupingBy(JobCategory::getParentId));
+        return level1.stream().map(cat1 -> {
+            JobCategoryTreeVo vo1 = new JobCategoryTreeVo();
+            vo1.setId(cat1.getId());
+            vo1.setName(cat1.getName());
+            vo1.setLevel(cat1.getLevel());
+            List<JobCategory> level2List = level2ByParent.getOrDefault(cat1.getId(), new ArrayList<>());
+            vo1.setChildren(level2List.stream().map(cat2 -> {
+                JobCategoryTreeVo vo2 = new JobCategoryTreeVo();
+                vo2.setId(cat2.getId());
+                vo2.setName(cat2.getName());
+                vo2.setLevel(cat2.getLevel());
+                List<JobCategory> level3List = level3ByParent.getOrDefault(cat2.getId(), new ArrayList<>());
+                vo2.setChildren(level3List.stream().map(cat3 -> {
+                    JobCategoryTreeVo vo3 = new JobCategoryTreeVo();
+                    vo3.setId(cat3.getId());
+                    vo3.setName(cat3.getName());
+                    vo3.setLevel(cat3.getLevel());
+                    vo3.setChildren(null);
+                    return vo3;
+                }).collect(Collectors.toList()));
+                return vo2;
+            }).collect(Collectors.toList()));
+            return vo1;
+        }).collect(Collectors.toList());
+    }
+
+    /**
+     * 按父级查询岗位分类列表
+     * <p>parentId为null查一级，否则查下一级</p>
+     */
+    public List<JobCategoryVo> getCategoriesByParent(Long parentId) {
+        List<JobCategory> categories;
+        if (parentId == null) {
+            categories = categoryMapper.selectList(new LambdaQueryWrapper<JobCategory>().eq(JobCategory::getLevel, 1));
+        } else {
+            categories = categoryMapper.selectList(new LambdaQueryWrapper<JobCategory>().eq(JobCategory::getParentId, parentId));
+        }
+        return categories.stream().map(c -> {
+            JobCategoryVo vo = new JobCategoryVo();
+            vo.setId(c.getId());
+            vo.setName(c.getName());
+            vo.setLevel(c.getLevel());
+            vo.setParentId(c.getParentId());
+            return vo;
+        }).collect(Collectors.toList());
+    }
+
+    /**
+     * 模糊搜索岗位分类
+     * <p>按分类名关键字模糊查询</p>
+     */
+    public List<JobCategoryVo> searchCategories(String keyword) {
+        List<JobCategory> categories = categoryMapper.selectList(new LambdaQueryWrapper<JobCategory>().like(JobCategory::getName, keyword));
+        return categories.stream().map(c -> {
+            JobCategoryVo vo = new JobCategoryVo();
+            vo.setId(c.getId());
+            vo.setName(c.getName());
+            vo.setLevel(c.getLevel());
+            vo.setParentId(c.getParentId());
+            return vo;
+        }).collect(Collectors.toList());
+    }
+}