diff --git a/src/main/java/net/lamgc/cgj/bot/framework/mirai/message/MiraiMessageEvent.java b/src/main/java/net/lamgc/cgj/bot/framework/mirai/message/MiraiMessageEvent.java
index beae46c..2177eb5 100644
--- a/src/main/java/net/lamgc/cgj/bot/framework/mirai/message/MiraiMessageEvent.java
+++ b/src/main/java/net/lamgc/cgj/bot/framework/mirai/message/MiraiMessageEvent.java
@@ -16,7 +16,7 @@ public class MiraiMessageEvent extends MessageEvent {
 
     public MiraiMessageEvent(ContactMessage message) {
         super(message instanceof GroupMessage ? ((GroupMessage) message).getGroup().getId() : 0,
-                message.getSender().getId(), message.getMessage().contentToString());
+                message.getSender().getId(), getMessageBodyWithoutSource(message.getMessage().toString()));
         this.messageObject = Objects.requireNonNull(message);
         if(message instanceof GroupMessage) {
             messageSender = new MiraiMessageSender(((GroupMessage) message).getGroup(), MessageSource.Group);
@@ -26,6 +26,19 @@ public class MiraiMessageEvent extends MessageEvent {
 
     }
 
+    /**
+     * 将ContactMessage获得的消息内容删除 Mirai:source 并返回.
+     * <p>该做法比较保守, 防止Mirai:source位置出现变动.</p>
+     * @param message ContactMessage的消息内容;
+     * @return 返回删除了Mirai:source的消息
+     */
+    private static String getMessageBodyWithoutSource(String message) {
+        StringBuilder builder = new StringBuilder(message);
+        int startIndex = builder.indexOf("[mirai:source:");
+        int endIndex = builder.indexOf("]", startIndex) + 1;
+        return builder.delete(startIndex, endIndex).toString();
+    }
+
     @Override
     public int sendMessage(final String message) {
         return messageSender.sendMessage(message);