diff --git a/src/main/java/com/gxwebsoft/cms/entity/CmsProductCategory.java b/src/main/java/com/gxwebsoft/cms/entity/CmsProductCategory.java
index 5006a96..9d7b494 100644
--- a/src/main/java/com/gxwebsoft/cms/entity/CmsProductCategory.java
+++ b/src/main/java/com/gxwebsoft/cms/entity/CmsProductCategory.java
@@ -31,6 +31,9 @@ public class CmsProductCategory implements Serializable {
     @TableId(value = "category_id", type = IdType.AUTO)
     private Integer categoryId;
 
+    @Schema(description = "上级分类ID, 0=顶级")
+    private Integer parentId;
+
     @Schema(description = "分类名称")
     private String categoryName;
 
diff --git a/src/main/java/com/gxwebsoft/cms/param/CmsProductCategoryParam.java b/src/main/java/com/gxwebsoft/cms/param/CmsProductCategoryParam.java
index 5130866..e379bec 100644
--- a/src/main/java/com/gxwebsoft/cms/param/CmsProductCategoryParam.java
+++ b/src/main/java/com/gxwebsoft/cms/param/CmsProductCategoryParam.java
@@ -23,6 +23,10 @@ public class CmsProductCategoryParam extends BaseParam {
     @QueryField(type = QueryType.EQ)
     private Integer categoryId;
 
+    @Schema(description = "上级分类ID, 0=顶级")
+    @QueryField(type = QueryType.EQ)
+    private Integer parentId;
+
     @Schema(description = "分类名称")
     @QueryField(type = QueryType.LIKE)
     private String categoryName;
diff --git a/src/main/java/com/gxwebsoft/cms/sql/cms_new_modules.sql b/src/main/java/com/gxwebsoft/cms/sql/cms_new_modules.sql
index 1d2f254..0f0e2cd 100644
--- a/src/main/java/com/gxwebsoft/cms/sql/cms_new_modules.sql
+++ b/src/main/java/com/gxwebsoft/cms/sql/cms_new_modules.sql
@@ -4,6 +4,7 @@
 -- ----------------------------
 CREATE TABLE IF NOT EXISTS `cms_product_category` (
   `category_id`   INT           NOT NULL AUTO_INCREMENT   COMMENT '分类ID',
+  `parent_id`     INT           NOT NULL DEFAULT 0        COMMENT '上级分类ID, 0=顶级',
   `category_name` VARCHAR(100)  NOT NULL                  COMMENT '分类名称',
   `status`        TINYINT       NOT NULL DEFAULT 1        COMMENT '状态: 1启用 0禁用',
   `sort_number`   INT           NOT NULL DEFAULT 0        COMMENT '排序(数字越小越靠前)',
@@ -12,9 +13,13 @@ CREATE TABLE IF NOT EXISTS `cms_product_category` (
   `create_time`   DATETIME      DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
   `update_time`   DATETIME      DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
   PRIMARY KEY (`category_id`),
-  KEY `idx_tenant_id` (`tenant_id`)
+  KEY `idx_tenant_id` (`tenant_id`),
+  KEY `idx_parent_id` (`parent_id`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='产品分类';
 
+-- 兼容已有库：补齐 parent_id 列（已存在则忽略）
+-- ALTER TABLE `cms_product_category` ADD COLUMN `parent_id` INT NOT NULL DEFAULT 0 COMMENT '上级分类ID, 0=顶级' AFTER `category_id`, ADD KEY `idx_parent_id` (`parent_id`);
+
 -- ----------------------------
 -- 产品表
 -- 官网展示的云产品