Traditional oil or grease lubricants can not meet the requirements of reducing friction of carbon steel parts under extreme working conditions.Dry film lubricant is a feasible method to improve the friction and wear performance of carbon steel surface under such working conditions.A dry film lubricant based on graphite powder was prepared by ultrasonic dispersion method,and the dry film lubricant was deposited on the surface of carbon steel by simple pressure spraying technology.A comparative experimental study on the friction and wear properties of dry friction and graphite dry film lubricant lubrication was carried out in the end friction tester.The results show that graphite dry film lubricant has good deposition effect on the surface of carbon steel.The deposited graphite dry film lubricant has good lubrication performance,which can effectively protect the surface of carbon steel from excessive wear.The working life of carbon steel sprayed with graphite dry film lubricant decreases with the increase of pressure load and spindle speed.The combination of load and sliding speed will accelerate the transition of coating to stable direction.The micro lubricant particles formed in the process of wear form particle flow lubrication,and the proper addition of graphite particles may prolong the normal time of friction reduction.The graphite dry film lubricant prepared provides support for reducing friction of carbon steel under extreme working conditions.