Abstract: The research progress of polytetrafluoroethylene(PTFE) porous membranes at home and abroad was summarized in this paper.Application of some modification methods such as fill modification,chemical processing modification,high energy irradiation grafting,plasma processing,plasma grafting polymerisation,ion beam implanting and excimer laser processing was introduced in PTFE porous membrane modification,and the development trend of PTFE porous membrane modification was presented.