Abstract: First the hardened and tempered H13 steel was surface treated by three methods of nitridation, physical vapor deposition(PVD) coating, and nitridation and PVD coating, and then the friction wear performance at high temperature of 600 ℃ of the specimens with different surface treatment states was studied on UMT-3 friction wear testing machine. The results indicate that the main wear forms of all specimens were adhesion wear and abrasive particle wear. After the different surface treatments, the hardness of the H13 steel increased obviously, and the friction coefficient reduced obviously. Specimens surface treated by nitridation and PVD coating method showed the best high temperature wear resistance.