To explore the effect of space environment on the working life of solid-lubricated rotating parts and forecast their working life in orbit, the influence of space environment on solid-lubricated films was analyzed. The analysis points out that three main factors are relative to the working life of the space rotating parts, which are space launch environment, vacuum degree and alternating temperature. A life test was designed to simulate the three factors, in which the mechanical test was used to simulate space launch environment, and the thermal vacuum test was taken to simulate the vacuum and alternating temperature. The X-ray Energy Dispersive Spectrometer (EDS)was used to analyze the film composition of the unworn race and the worn race for a bearing in the solid-lubricated rotating part as well as ball surface materials.The analysis results show that the transfer film has not formed. On the result, it forecasts that the working life of the solid-lubricated rotating part in the test would be up to 107 times. Finally, it gives some necessary suggests that should been taken to increase the reliability and improve the work life of space rotating parts.