diff --git a/display.py b/display.py
index cc1c090..65e6d3f 100644
--- a/display.py
+++ b/display.py
@@ -181,6 +181,12 @@ def pframe():
                 speed = self.move.dspeed
                 self.max_Kps = KPS if KPS>self.max_Kps else self.max_Kps
                 self.max_speed = speed if speed>self.max_speed else self.max_speed
+                if self.akey.clearKPS == True: # known bug: press reset when not self.idle_idle will refresh self.max_KPS in next frame
+                    self.max_Kps = 0.0
+                    self._change_num(self.akps_num, self.max_Kps, self.akps_center)
+                    #self.mtext.set_option(display=1)
+                    self._display()
+                    self.akey.clearKPS = False
                 kkps, kp, kdp, key_tapnum = [], [], [], []
                 for i in range(self.keynum):
                     kkps += [self.all_key[i].dKPS]
diff --git a/tap.py b/tap.py
index 3374fdc..2c4143b 100644
--- a/tap.py
+++ b/tap.py
@@ -22,6 +22,7 @@ def start(self):
                 allkeytap += keyn.alltap
             self.akey._cal_KPS(KPS)
             self.akey._cal_dKPS()
+            self.akey.check_reset_maxKPS()
             self.akey.alltap = allkeytap
             sleep(0.01)
 
@@ -43,6 +44,7 @@ def __init__(self, dposition_decrease= 0.05, tapframes = 100, need_standframes =
         self.alltap = 0
         self.KPS = 0
         self.dKPS = 0
+        self.clearKPS = False
         self.standframes = 0
         self.stand_all_KPS = 0
         # exit
@@ -95,6 +97,10 @@ def _cal_dKPS(self):
                 self.__change_dKPS()                                         # KPS is not stand
 
         return self.dKPS
+    
+    def check_reset_maxKPS(self):
+        if is_pressed("ctrl+r"):
+            self.clearKPS = True
 
 class key(allKey):
     def __init__(self, keynum, keystr, is_mouse = False, dposition_decrease= 0.05, tapframes = 100, need_standframes = 100, basemul = 10, decrease_lv = 2, zero_decrease_lv = 1):