The work aims to study the application of GLC and DLC carbon films in aeroengine bearing under oil starvation condition. GLC and DLC thin films were prepared on the surface of single crystal silicon P(100), bearing steel and bearing ring by magnetron sputtering technique. The cross-section, wear morphology and structure of the films were analyzed by SEM and Raman. The mechanical properties and tribological properties of the films were studied by nano-indentation instrument and friction and wear tester. The bearing test machine was used to compare these two film-coated bearings. The structure of the GLC and DLC films were both compact. The GLC films contained more sp2, but DLC films contained more sp3. The hardness and elastic modulus of the two films were up to 18.2 GPa, 22.2 GPa and 230.2 GPa, 260.8 GPa respectively. Under dry friction conditions, the friction coefficient was as low as 0.11 and 0.21, respectively. There was no significant difference in the temperature rise of the coated bearings between 0 to 10 h. The temperature rise of the GLC films bearing was about 40~45 ℃ during 10~30 h, while the temperature rise of the DLC films bearing was about 50~55 ℃. The transfer film appeared on the bearing rollers and the bearing wear of GLC films was more serious than that of DLC films after the operation. The DLC films have better environmental adaptability under oil starvation condition.