The in-situ synthesis CrN/MoS2 solid self-lubricant composite coating was obtained by magnetron sputtering and low-temperature ion sulfuring. The XPS, AES and SEM equipped with EDS were used to observe and analyze the microstructure of the composite coating. The results show that the MoS2 is composed of sulfur which is infiltrated in 500 nm depth of the composite coating. The CETR inching tribology tester was used to analyze the tribological properties of CrN-based composite coating. The wear volume from big to small is CrMoN＞CrN/MoS2. It means that the CrN/MoS2 solid self-lubricant composite coating shows better wear resistance and antifriction. The film-forming mechanism and the frictional wear mechanism of CrN-based solid self-lubricant composite coating were discussed