diff --git a/packages/hydrooj/locales/zh.yaml b/packages/hydrooj/locales/zh.yaml
index 4595b1d9a..a4bf95afa 100644
--- a/packages/hydrooj/locales/zh.yaml
+++ b/packages/hydrooj/locales/zh.yaml
@@ -1,6 +1,7 @@
 __id: zh
 __langname: 简体中文
 '"{data}" copied to clipboard!': “{data}”已复制到剪贴板！
+'{0} {1} delete your discussion reply {2} in "{3}"({4}).' : '{0} {1} 从讨论 {3}({4}) 删除了你的回复 {2}。'
 '{0} comments': '{0} 条评论'
 '{0} discussions': '{0} 条讨论'
 '{0} is a moderator of this domain.': '{}是这个域的管理者之一。'
@@ -59,6 +60,8 @@ Add new data: 添加新数据
 Add User: 添加用户
 Add: 添加
 Additional File: 附加文件
+Admin {0} delete your discussion "{1}". : 管理员 {0} 删除了你的讨论 "{1}"。
+Admin {0} delete your discussion tail reply {1} in "{2}"({3}). : 管理员 {0} 从讨论 {2}({3}) 中删除了你的楼中楼回复 {1}。
 All {0} Contests: 所有 {0} 比赛
 All Contests: 所有比赛
 All Homeworks: 所有作业
diff --git a/packages/hydrooj/src/handler/discussion.ts b/packages/hydrooj/src/handler/discussion.ts
index 7b4743445..b33499367 100644
--- a/packages/hydrooj/src/handler/discussion.ts
+++ b/packages/hydrooj/src/handler/discussion.ts
@@ -282,14 +282,26 @@ class DiscussionDetailHandler extends DiscussionHandler {
 
     @param('drid', Types.ObjectID)
     async postDeleteReply(domainId: string, drid: ObjectID) {
+        const deleteBy = this.user.own(this.drdoc) ? 'self' : this.user.own(this.ddoc) ? 'DiscussionOwner' : 'Admin';
         if (!(this.user.own(this.ddoc)
             && this.user.hasPerm(PERM.PERM_DELETE_DISCUSSION_REPLY_SELF_DISCUSSION))) {
             if (!this.user.own(this.drdoc)) {
                 this.checkPerm(PERM.PERM_DELETE_DISCUSSION_REPLY);
             } else this.checkPerm(PERM.PERM_DELETE_DISCUSSION_SELF);
         }
+        const msg = JSON.stringify({
+            message: '{0} {1} delete your discussion reply {2} in "{3}"({4:link}).',
+            params: [
+                deleteBy,
+                this.user.uname,
+                this.drdoc.content.length > 10 ? `${this.drdoc.content.substring(0, 10)}...` : `${this.drdoc.content}`,
+                this.ddoc.title,
+                `/d/${domainId}${this.request.path}`,
+            ],
+        });
         await Promise.all([
             discussion.delReply(domainId, drid),
+            deleteBy !== 'self' && message.send(1, this.drdoc.owner, msg, message.FLAG_RICHTEXT | message.FLAG_UNREAD),
             oplog.log(this, 'discussion.reply.delete', this.drdoc),
         ]);
         this.back();
@@ -311,9 +323,20 @@ class DiscussionDetailHandler extends DiscussionHandler {
     @param('drid', Types.ObjectID)
     @param('drrid', Types.ObjectID)
     async postDeleteTailReply(domainId: string, drid: ObjectID, drrid: ObjectID) {
+        const deleteBy = this.user.own(this.drrdoc) ? 'self' : 'Admin';
         if (!this.user.own(this.drrdoc)) this.checkPerm(PERM.PERM_DELETE_DISCUSSION_REPLY);
+        const msg = JSON.stringify({
+            message: 'Admin {0} delete your discussion tail reply {1} in "{2}"({3:link}).',
+            params: [
+                this.user.uname,
+                this.drrdoc.content.length > 10 ? `${this.drrdoc.content.substring(0, 10)}...` : this.drrdoc.content,
+                this.ddoc.title,
+                `/d/${domainId}${this.request.path}`,
+            ],
+        });
         await Promise.all([
             discussion.delTailReply(domainId, drid, drrid),
+            deleteBy !== 'self' && message.send(1, this.drrdoc.owner, msg, message.FLAG_RICHTEXT | message.FLAG_UNREAD),
             oplog.log(this, 'discussion.tailReply.delete', this.drrdoc),
         ]);
         this.back();
@@ -379,10 +402,19 @@ class DiscussionEditHandler extends DiscussionHandler {
 
     @param('did', Types.ObjectID)
     async postDelete(domainId: string, did: ObjectID) {
+        const deleteBy = this.user.own(this.ddoc) ? 'self' : 'Admin';
         if (!this.user.own(this.ddoc)) this.checkPerm(PERM.PERM_DELETE_DISCUSSION);
         else this.checkPerm(PERM.PERM_DELETE_DISCUSSION_SELF);
+        const msg = JSON.stringify({
+            message: 'Admin {0} delete your discussion "{1}".',
+            params: [
+                this.user.uname,
+                this.ddoc.title,
+            ],
+        });
         await Promise.all([
             oplog.log(this, 'discussion.delete', this.ddoc),
+            deleteBy !== 'self' && message.send(1, this.ddoc.owner, msg, message.FLAG_RICHTEXT | message.FLAG_UNREAD),
             discussion.del(domainId, did),
         ]);
         this.response.body = { type: this.ddoc.parentType, parent: this.ddoc.parentId };