diff --git a/backend/src/main/java/com/yfd/platform/qgc_base/controller/SdAddvcdDicController.java b/backend/src/main/java/com/yfd/platform/qgc_base/controller/SdAddvcdDicController.java
new file mode 100644
index 00000000..ff404809
--- /dev/null
+++ b/backend/src/main/java/com/yfd/platform/qgc_base/controller/SdAddvcdDicController.java
@@ -0,0 +1,27 @@
+package com.yfd.platform.qgc_base.controller;
+
+import com.yfd.platform.config.ResponseResult;
+import com.yfd.platform.qgc_base.domain.SdAddvcdDicDropdownRequest;
+import com.yfd.platform.qgc_base.service.ISdAddvcdDicService;
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.tags.Tag;
+import jakarta.annotation.Resource;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/env/addvcd")
+@Tag(name = "行政区管理")
+public class SdAddvcdDicController {
+
+    @Resource
+    private ISdAddvcdDicService addvcdDicService;
+
+    @PostMapping("/selectForDropdown")
+    @Operation(summary = "根据级别和父级行政区编码查询行政区下拉")
+    public ResponseResult selectForDropdown(@RequestBody SdAddvcdDicDropdownRequest request) {
+        return ResponseResult.successData(addvcdDicService.selectForDropdown(request.getGrd(), request.getPaddvcd()));
+    }
+}
diff --git a/backend/src/main/java/com/yfd/platform/qgc_base/domain/SdAddvcdDic.java b/backend/src/main/java/com/yfd/platform/qgc_base/domain/SdAddvcdDic.java
new file mode 100644
index 00000000..69223c3e
--- /dev/null
+++ b/backend/src/main/java/com/yfd/platform/qgc_base/domain/SdAddvcdDic.java
@@ -0,0 +1,93 @@
+package com.yfd.platform.qgc_base.domain;
+
+import com.baomidou.mybatisplus.annotation.IdType;
+import com.baomidou.mybatisplus.annotation.TableId;
+import com.baomidou.mybatisplus.annotation.TableName;
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+
+import java.io.Serializable;
+
+/**
+ * <p>
+ * 行政区字典表
+ * </p>
+ */
+@Data
+@EqualsAndHashCode(callSuper = false)
+@TableName("SD_ADDVCD_DIC")
+public class SdAddvcdDic implements Serializable {
+
+    private static final long serialVersionUID = 1L;
+
+    /**
+     * 行政区编码
+     */
+    @TableId(type = IdType.INPUT)
+    private String addvcd;
+
+    /**
+     * 行政区划名称
+     */
+    private String addvnm;
+
+    /**
+     * 所属行政编码，根节点为空
+     */
+    private String paddvcd;
+
+    /**
+     * 树级别，从1开始 1=省 2=市 3=县
+     */
+    private Integer grd;
+
+    /**
+     * 树全路径
+     */
+    private String path;
+
+    /**
+     * 排序
+     */
+    private Integer orderIndex;
+
+    /**
+     * 中心经度
+     */
+    private Double lgtd;
+
+    /**
+     * 中心纬度
+     */
+    private Double lttd;
+
+    /**
+     * 面积
+     */
+    private Double area;
+
+    /**
+     * 周长
+     */
+    private Double perimeter;
+
+    /**
+     * 所属国家
+     */
+    private String country;
+
+    /**
+     * 简介
+     */
+    private String introduce;
+
+    /**
+     * 介绍图片
+     */
+    private String inffile;
+
+    /**
+     * 简称
+     */
+    private String shortname;
+}
diff --git a/backend/src/main/java/com/yfd/platform/qgc_base/domain/SdAddvcdDicDropdownRequest.java b/backend/src/main/java/com/yfd/platform/qgc_base/domain/SdAddvcdDicDropdownRequest.java
new file mode 100644
index 00000000..27409592
--- /dev/null
+++ b/backend/src/main/java/com/yfd/platform/qgc_base/domain/SdAddvcdDicDropdownRequest.java
@@ -0,0 +1,17 @@
+package com.yfd.platform.qgc_base.domain;
+
+import lombok.Data;
+
+@Data
+public class SdAddvcdDicDropdownRequest {
+
+    /**
+     * 树级别，从1开始 1=省 2=市 3=县
+     */
+    private Integer grd;
+
+    /**
+     * 所属行政编码，根节点为空
+     */
+    private String paddvcd;
+}
diff --git a/backend/src/main/java/com/yfd/platform/qgc_base/mapper/SdAddvcdDicMapper.java b/backend/src/main/java/com/yfd/platform/qgc_base/mapper/SdAddvcdDicMapper.java
new file mode 100644
index 00000000..9016fb28
--- /dev/null
+++ b/backend/src/main/java/com/yfd/platform/qgc_base/mapper/SdAddvcdDicMapper.java
@@ -0,0 +1,12 @@
+package com.yfd.platform.qgc_base.mapper;
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.yfd.platform.qgc_base.domain.SdAddvcdDic;
+
+/**
+ * <p>
+ * 行政区字典表 Mapper 接口
+ * </p>
+ */
+public interface SdAddvcdDicMapper extends BaseMapper<SdAddvcdDic> {
+}
diff --git a/backend/src/main/java/com/yfd/platform/qgc_base/service/ISdAddvcdDicService.java b/backend/src/main/java/com/yfd/platform/qgc_base/service/ISdAddvcdDicService.java
new file mode 100644
index 00000000..f02313c4
--- /dev/null
+++ b/backend/src/main/java/com/yfd/platform/qgc_base/service/ISdAddvcdDicService.java
@@ -0,0 +1,19 @@
+package com.yfd.platform.qgc_base.service;
+
+import com.baomidou.mybatisplus.extension.service.IService;
+import com.yfd.platform.qgc_base.domain.SdAddvcdDic;
+
+import java.util.List;
+
+/**
+ * <p>
+ * 行政区字典表 服务类
+ * </p>
+ */
+public interface ISdAddvcdDicService extends IService<SdAddvcdDic> {
+
+    /**
+     * 根据级别和父级行政区编码查询下拉数据
+     */
+    List<SdAddvcdDic> selectForDropdown(Integer grd, String paddvcd);
+}
diff --git a/backend/src/main/java/com/yfd/platform/qgc_base/service/impl/SdAddvcdDicServiceImpl.java b/backend/src/main/java/com/yfd/platform/qgc_base/service/impl/SdAddvcdDicServiceImpl.java
new file mode 100644
index 00000000..05f5a959
--- /dev/null
+++ b/backend/src/main/java/com/yfd/platform/qgc_base/service/impl/SdAddvcdDicServiceImpl.java
@@ -0,0 +1,28 @@
+package com.yfd.platform.qgc_base.service.impl;
+
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+import com.yfd.platform.qgc_base.domain.SdAddvcdDic;
+import com.yfd.platform.qgc_base.mapper.SdAddvcdDicMapper;
+import com.yfd.platform.qgc_base.service.ISdAddvcdDicService;
+import org.springframework.stereotype.Service;
+import org.springframework.util.StringUtils;
+
+import java.util.List;
+
+/**
+ * <p>
+ * 行政区字典表 服务实现类
+ * </p>
+ */
+@Service
+public class SdAddvcdDicServiceImpl extends ServiceImpl<SdAddvcdDicMapper, SdAddvcdDic> implements ISdAddvcdDicService {
+
+    @Override
+    public List<SdAddvcdDic> selectForDropdown(Integer grd, String paddvcd) {
+        return this.lambdaQuery()
+                .eq(grd != null, SdAddvcdDic::getGrd, grd)
+                .eq(StringUtils.hasText(paddvcd), SdAddvcdDic::getPaddvcd, paddvcd)
+                .orderByAsc(SdAddvcdDic::getOrderIndex)
+                .list();
+    }
+}