diff --git a/src/main/java/com/rymcu/vertical/dto/ArticleTagDTO.java b/src/main/java/com/rymcu/vertical/dto/ArticleTagDTO.java
index 7eb15f7..ed69468 100644
--- a/src/main/java/com/rymcu/vertical/dto/ArticleTagDTO.java
+++ b/src/main/java/com/rymcu/vertical/dto/ArticleTagDTO.java
@@ -7,8 +7,13 @@ import lombok.Data;
  */
 @Data
 public class ArticleTagDTO {
+
+    private Integer idArticleTag;
+
     private Integer idTag;
 
+    private Integer idArticle;
+
     private String tagTitle;
 
     private String tagUri;
diff --git a/src/main/java/com/rymcu/vertical/mapper/ArticleMapper.java b/src/main/java/com/rymcu/vertical/mapper/ArticleMapper.java
index 05bc666..d7408b6 100644
--- a/src/main/java/com/rymcu/vertical/mapper/ArticleMapper.java
+++ b/src/main/java/com/rymcu/vertical/mapper/ArticleMapper.java
@@ -111,4 +111,11 @@ public interface ArticleMapper extends Mapper<Article> {
      * @return
      */
     List<ArticleDTO> selectDrafts(@Param("idUser") Integer idUser);
+
+    /**
+     * 删除未使用的文章标签
+     * @param idArticleTag
+     * @return
+     */
+    Integer deleteUnusedArticleTag(@Param("idArticleTag") Integer idArticleTag);
 }
diff --git a/src/main/java/com/rymcu/vertical/service/impl/TagServiceImpl.java b/src/main/java/com/rymcu/vertical/service/impl/TagServiceImpl.java
index 256e56a..1b658cb 100644
--- a/src/main/java/com/rymcu/vertical/service/impl/TagServiceImpl.java
+++ b/src/main/java/com/rymcu/vertical/service/impl/TagServiceImpl.java
@@ -41,13 +41,13 @@ public class TagServiceImpl extends AbstractService<Tag> implements TagService {
         String articleTags = article.getArticleTags();
         if(StringUtils.isNotBlank(articleTags)){
             String[] tags = articleTags.split(",");
+            List<ArticleTagDTO> articleTagDTOList = articleMapper.selectTags(article.getIdArticle());
             for (int i = 0; i < tags.length; i++) {
                 boolean addTagArticle = false;
                 boolean addUserTag = false;
                 Tag tag = new Tag();
                 tag.setTagTitle(tags[i]);
                 tag = tagMapper.selectOne(tag);
-                List<ArticleTagDTO> articleTagDTOList = articleMapper.selectTags(article.getIdArticle());
                 if(tag == null){
                     tag = new Tag();
                     tag.setTagTitle(tags[i]);
@@ -59,6 +59,11 @@ public class TagServiceImpl extends AbstractService<Tag> implements TagService {
                     addTagArticle = true;
                     addUserTag = true;
                 } else {
+                    for(ArticleTagDTO articleTag : articleTagDTOList) {
+                        if (articleTag.getIdTag().equals(tag.getIdTag())) {
+                            articleTagDTOList.remove(articleTag);
+                        }
+                    }
                     Integer count = tagMapper.selectCountTagArticleById(tag.getIdTag(),article.getIdArticle());
                     if(count == 0){
                         tag.setTagArticleCount(tag.getTagArticleCount() + 1);
@@ -70,6 +75,9 @@ public class TagServiceImpl extends AbstractService<Tag> implements TagService {
                         addUserTag = true;
                     }
                 }
+                articleTagDTOList.forEach(articleTagDTO -> {
+                    articleMapper.deleteUnusedArticleTag(articleTagDTO.getIdArticleTag());
+                });
                 if(addTagArticle){
                     tagMapper.insertTagArticle(tag.getIdTag(),article.getIdArticle());
                 }
diff --git a/src/main/java/mapper/ArticleMapper.xml b/src/main/java/mapper/ArticleMapper.xml
index 49335d9..d2426a5 100644
--- a/src/main/java/mapper/ArticleMapper.xml
+++ b/src/main/java/mapper/ArticleMapper.xml
@@ -51,11 +51,13 @@
         <result column="updated_time" property="updatedTime"/>
     </resultMap>
     <resultMap id="ArticleTagDTOResultMap" type="com.rymcu.vertical.dto.ArticleTagDTO">
-        <id column="id" property="idTag"/>
-        <id column="tag_title" property="tagTitle"/>
-        <id column="tag_icon_path" property="tagIconPath"/>
-        <id column="tag_uri" property="tagUri"/>
-        <id column="tag_description" property="tagDescription"/>
+        <id column="id" property="idArticleTag"/>
+        <result column="id_tag" property="idTag"></result>
+        <result column="id_article" property="idArticle"></result>
+        <result column="tag_title" property="tagTitle"></result>
+        <result column="tag_icon_path" property="tagIconPath"></result>
+        <result column="tag_uri" property="tagUri"></result>
+        <result column="tag_description" property="tagDescription"></result>
     </resultMap>
     <insert id="insertArticleContent">
         insert into vertical_article_content (id_article,article_content,article_content_html,created_time,updated_time)
@@ -70,6 +72,9 @@
     <delete id="deleteTagArticle">
         delete from vertical_tag_article where id_article = #{id}
     </delete>
+    <delete id="deleteUnusedArticleTag">
+        delete from vertical_tag_article where id = #{idArticleTag}
+    </delete>
     <select id="selectArticles" resultMap="DTOResultMap">
         select art.*,su.nickname,su.avatar_url from vertical_article art left join vertical_user su on art.article_author_id = su.id where article_status = '0' order by updated_time desc
     </select>
@@ -95,7 +100,7 @@
         select art.*,su.nickname,su.avatar_url from vertical_article art left join vertical_user su on su.id = #{idUser} and art.article_author_id = su.id where article_author_id = #{idUser} order by updated_time desc
     </select>
     <select id="selectTags" resultMap="ArticleTagDTOResultMap">
-        select vt.id, vt.tag_title, vt.tag_icon_path, vt.tag_uri, vt.tag_description from vertical_tag vt left join vertical_tag_article vta on vt.id = vta.id_tag where vta.id_article = #{idArticle}
+        select vta.id, vta.id_tag, vta.id_article, vt.tag_title, vt.tag_icon_path, vt.tag_uri, vt.tag_description from vertical_tag vt left join vertical_tag_article vta on vt.id = vta.id_tag where vta.id_article = #{idArticle}
     </select>
     <select id="selectDrafts" resultMap="DTOResultMap">
         select art.*,su.nickname,su.avatar_url from vertical_article art left join vertical_user su on art.article_author_id = su.id where article_status = '1' and art.article_author_id = #{idUser} order by updated_time desc