Abstract: MoS_2/WS_2 composite lubricating film was prepared by magnetron co-sputtering method.X-ray diffraction,energy dispersive X-ray detector and transmission electron microscopy were used to analyze the composition and microstructure of the films.The friction and wear behavior was performed on a reciprocating pin-on-disk tribometer at room temperature in air(RH=45%~50%).The composite film had a compact microstructure and therefore it improved oxidation resistance.As compared with pure MoS_2 film,the MoS_2/WS_2 composite film exhibited improved friction stability,wear durability and load-carrying capacity,and the composite film also revealed much lower friction coefficient.