Abstract: Effect of load， time， sliding speed and stuffing on the friction and wear characteristics of polytetrafluoroethylene (PTFE) is studied using MPV—200 model of friction and wear tester under dry friction condition. Experimental results show that filling PTFE with MoS2， fiber-glass，graphite and carbon fiber stuffing can reduce the wear of PTFE by 2 orders of magnitude， and graphite reduces the friction coefficient of PTFE， but glass fiber and carbon fiber increase the friction coefficient of PTFE. The friction coefficient and wear rate will decrease with increasing of working time， in the end， they reach stable value， at the same time， they will increase at first and then reduce with rising of speed， furthermore， the friction coefficient will reduce with raising of load， but wear rate will increase with raising of load. Mechanism is systematically analyzed and discussed， the conclusion in this paper possesses important theoretic significance for optimizing of structure and property of material.

Key words: Characteristic, Friction and wear, PTFE, Study