Aiming at the problem of vamishing cratering in the new line of painting,the compressed air,chain oil,filter material,body cleaning cloth and robot atomizer were checked.It was determined that the compressed air leinperature of the robot was low,the condensate water was formed on the surface of the atomizer,and the drop to the body forms the cratering.Finally,the problem of condensation water and cratering of atomizer was eliminated by installing compressed air heating device.