diff --git a/filecomplete.cpp b/filecomplete.cpp
index e656e3b..82ec7ee 100644
--- a/filecomplete.cpp
+++ b/filecomplete.cpp
@@ -497,6 +497,10 @@ char* fc_readline()
         ++len;
     };
 
+    bool need_predic = true;
+    std::chrono::time_point<std::chrono::high_resolution_clock> p1, p2;
+    p1 = std::chrono::high_resolution_clock::now();
+
     while (1) {
         word.clear();
         clear_line();
@@ -521,10 +525,19 @@ char* fc_readline()
         }
 #endif
         set_cursor_x(cur_pos + 1);
+        need_predic = true;
 
         // Read character from console
         int ch = _getch();
 
+        p2 = p1;
+        p1 = std::chrono::high_resolution_clock::now();
+
+        auto duration = std::chrono::duration_cast<std::chrono::milliseconds>(p1 - p2).count();
+        if (duration <= 10) {
+            need_predic = false;
+        }
+
         switch (ch) {
         case ENTER:
             append_his(main_buf);
@@ -624,7 +637,12 @@ char* fc_readline()
         }
         // 补正
         trans2buf(tmp_buf);
-        str_predict = file_predict(tmp_buf);
+        if (need_predic) {
+            str_predict = file_predict(tmp_buf);
+        } else if (!str_predict.empty()) {
+            str_predict.clear();
+        }
+        p1 = std::chrono::high_resolution_clock::now();
     }
     return main_buf;
 }