diff --git a/robots/mini_quadrotor/script/approaching_human_with_depth.py b/robots/mini_quadrotor/script/approaching_human_with_depth.py
index f6f96580e..e5906a473 100755
--- a/robots/mini_quadrotor/script/approaching_human_with_depth.py
+++ b/robots/mini_quadrotor/script/approaching_human_with_depth.py
@@ -53,9 +53,9 @@ def __init__(self):
         self.pose = Odometry()
         self.euler = Vector3()
 
-        self.Kp = 0.05
+        self.Kp = 0.1
         self.Ki = 0.0001
-        self.Kd = 0.01
+        self.Kd = 0.07
         #self.offset = 0.09/(0.08*abs(self.degree[2]-self.initial_position[2])+0.3) + 1
 
         #depth(OpenCV image)
@@ -227,7 +227,7 @@ def timerCallback(self,event):
                     self.land_cnt += 1
                     if self.land_cnt >= 10:
                         rospy.loginfo("land!")
-                        self.land_pub.publish()
+                        #self.land_pub.publish()
                 self.rotate_cnt += 1
             else:
                 rospy.loginfo("don't see people")