In order to study the applicability of Z-type perfluoropolyether (PFPE-Z) lubricant in high temperature and atmospheric environment,the evaporation loss test,maximum operating temperature test and corrosion test of PFPE-Z lubricant were carried out in high temperature and atmospheric environment respectively to determine the maximum operating temperature of PFPE-Z lubricant.Ultrafine depth of field digital microscopic system,energy disperse spectroscopy (EDS) and fourier transform infrared spectrophotometer (FTIR) were used for microscopic observation and component analysis for the bearing materials and PFPE-Z lubricating oi,and the corrosion rate of PFPE-Z lubricating oil to different bearing materials and the degradation rate of PFPE-Z lubricating oil were obtained.The results show that in high temperature and atmospheric environment,the maximum operating temperature of PFPE-Z grease (PTFE thickened) is 290 ℃,the maximum operating temperature of PFPE-Z lubricating oil is 310 ℃.PFPE-Z lubricating oil is corrosive to common metal materials of bearings,but the corrosion rate of different metal materials is different.