diff --git a/main.js b/main.js
new file mode 100644
index 0000000..e56e8eb
--- /dev/null
+++ b/main.js
@@ -0,0 +1,30 @@
+// ==UserScript==
+// @name         No Misskey Side Timeline
+// @namespace    https://github.com/omg-xtao
+// @version      1.0
+// @description  移除预览 Misskey 实例时的站点时间线
+// @author       omg-xtao
+// @match        http*://*/*
+// @icon         data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==
+// @grant        none
+// ==/UserScript==
+
+(function() {
+    'use strict';
+
+    function remove_dom(n) {
+        var dom = document.querySelector("#misskey_app > div.mk-app > div.side > div.dashboard > div > div.x69lt.x2yRw");
+        if (dom !== null) {
+            dom.remove();
+            console.info(`%c No Misskey Side Timeline %c 已移除此页面包含的时间线`, "color:white;background:green;font-weight:bold","color:red");
+        } else {
+            if (n < 60) {
+                setTimeout(() => {
+                    remove_dom(n + 1);
+                }, 1000);
+            }
+        }
+    }
+
+    remove_dom(1);
+})();