diff --git a/background.js b/background.js
index 98d147c..4d5b082 100644
--- a/background.js
+++ b/background.js
@@ -39,12 +39,12 @@ function enhanceGoogleSearchFilter(key, val) {
 function getSearchFilter(key, val) {
     let result = key + "=" + val
     filter_lines = JSON.parse(localStorage.getItem("filter_key"))
-    if (!filter_lines) return
+    if (!filter_lines) return result
     for (let i = 0; i < filter_lines.length; i++) {
         let filter_line = filter_lines[i]
         if (String(val).indexOf(String(filter_line.val)) != -1) continue
         if (filter_line.active) {
-            result += ("%20-" + filter_line.val + "&")
+            result += ("%20-" + filter_line.val)
         }
     }
     return result ? result : ""
diff --git a/popup.js b/popup.js
index 703bc13..2be88bf 100644
--- a/popup.js
+++ b/popup.js
@@ -87,7 +87,7 @@ function init_triggers() {
     // 每次append 都要为所有的 delete btn 绑定上删除事件
     common_add_element_event_trigger("delete-filter", callback_btn_remove_ele, false, 'click')
     // 为 input text 绑定 onblur 事件
-    common_add_element_event_trigger("filter-text-input", callback_input_on_blur, true, "onblur")
+    common_add_element_event_trigger("filter-text-input", callback_input_on_blur, true, "onchange")
     common_add_element_event_trigger("select-box", callback_checkbox_checked, false, "click")
 }