diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/api/WxCpGroupRobotService.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/api/WxCpGroupRobotService.java
index b5a9579e0..9839afb9e 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/api/WxCpGroupRobotService.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/api/WxCpGroupRobotService.java
@@ -88,4 +88,13 @@ public interface WxCpGroupRobotService {
    * @throws WxErrorException 异常
    */
   void sendNews(String webhookUrl, List<NewArticle> articleList) throws WxErrorException;
+
+  /**
+   * 发送文件类型的消息
+   *
+   * @param webhookUrl  webhook地址
+   * @param mediaId 文件id
+   * @throws WxErrorException 异常
+   */
+  void sendFile(String webhookUrl, String mediaId) throws WxErrorException;
 }
diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/api/impl/WxCpGroupRobotServiceImpl.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/api/impl/WxCpGroupRobotServiceImpl.java
index 9661adf47..056a51fdd 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/api/impl/WxCpGroupRobotServiceImpl.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/api/impl/WxCpGroupRobotServiceImpl.java
@@ -1,7 +1,6 @@
 package me.chanjar.weixin.cp.api.impl;
 
 import lombok.RequiredArgsConstructor;
-import me.chanjar.weixin.common.error.WxError;
 import me.chanjar.weixin.common.error.WxErrorException;
 import me.chanjar.weixin.cp.api.WxCpGroupRobotService;
 import me.chanjar.weixin.cp.api.WxCpService;
@@ -14,8 +13,6 @@ import org.apache.commons.lang3.StringUtils;
 import java.util.List;
 
 import static me.chanjar.weixin.cp.constant.WxCpConsts.GroupRobotMsgType;
-import static me.chanjar.weixin.cp.constant.WxCpConsts.GroupRobotMsgType.MARKDOWN;
-import static me.chanjar.weixin.cp.constant.WxCpConsts.GroupRobotMsgType.TEXT;
 
 /**
  * 企业微信群机器人消息发送api 实现
@@ -59,7 +56,7 @@ public class WxCpGroupRobotServiceImpl implements WxCpGroupRobotService {
   @Override
   public void sendText(String webhookUrl, String content, List<String> mentionedList, List<String> mobileList) throws WxErrorException {
     this.cpService.postWithoutToken(webhookUrl, new WxCpGroupRobotMessage()
-      .setMsgType(TEXT)
+      .setMsgType(GroupRobotMsgType.TEXT)
       .setContent(content)
       .setMentionedList(mentionedList)
       .setMentionedMobileList(mobileList)
@@ -69,7 +66,7 @@ public class WxCpGroupRobotServiceImpl implements WxCpGroupRobotService {
   @Override
   public void sendMarkdown(String webhookUrl, String content) throws WxErrorException {
     this.cpService.postWithoutToken(webhookUrl, new WxCpGroupRobotMessage()
-      .setMsgType(MARKDOWN)
+      .setMsgType(GroupRobotMsgType.MARKDOWN)
       .setContent(content)
       .toJson());
   }
@@ -89,4 +86,11 @@ public class WxCpGroupRobotServiceImpl implements WxCpGroupRobotService {
       .setArticles(articleList).toJson());
   }
 
+  @Override
+  public void sendFile(String webhookUrl, String mediaId) throws WxErrorException {
+    this.cpService.postWithoutToken(webhookUrl, new WxCpGroupRobotMessage()
+      .setMsgType(GroupRobotMsgType.FILE)
+      .setMediaId(mediaId).toJson());
+  }
+
 }
diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/message/WxCpGroupRobotMessage.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/message/WxCpGroupRobotMessage.java
index 387b454cd..bf73d2e6e 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/message/WxCpGroupRobotMessage.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/message/WxCpGroupRobotMessage.java
@@ -57,6 +57,11 @@ public class WxCpGroupRobotMessage implements Serializable {
    */
   private List<NewArticle> articles;
 
+  /**
+   * 文件id
+   */
+  private String mediaId;
+
   public String toJson() {
     JsonObject messageJson = new JsonObject();
     messageJson.addProperty("msgtype", this.getMsgType());
@@ -112,6 +117,12 @@ public class WxCpGroupRobotMessage implements Serializable {
         messageJson.add("news", text);
         break;
       }
+      case FILE: {
+        JsonObject file = new JsonObject();
+        file.addProperty("media_id", this.getMediaId());
+        messageJson.add("file", file);
+        break;
+      }
       default:
 
     }
diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/constant/WxCpConsts.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/constant/WxCpConsts.java
index 3a4c10e21..d6c506a69 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/constant/WxCpConsts.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/constant/WxCpConsts.java
@@ -374,6 +374,12 @@ public class WxCpConsts {
      * 图文消息（点击跳转到外链）.
      */
     public static final String NEWS = "news";
+
+    /**
+     * 文件类型消息.
+     */
+    public static final String FILE = "file";
+
   }
 
   /**