The thermal expansion caused by the temperature rise of the bearing will destroy the matching relationship between its parts and affect the flexibility of the bearing movement and reduce the service life of bearing. In order to investigate the transient temperature field caused by friction heat during the rolling-sliding bearing movement to assist the structural design of the new type bearing, the frictional dynamics model of roller-sliding bearing was established; the friction thermal simulation of the rolling-sliding bearing was carried out by using ABAQUS software. The results show that during the process from starting to stable operation, the friction torque of the rolling-sliding bearing is from small to big, then to small, finally to stable; in the start-up phase, the temperature rise will occur in the bearing region, but not in the non-bearing region; in the operation stage, the temperature rise region of the load-bearing region presents asymmetry and leans towards the non-load-bearing region; the temperature rise of the contact area between the slider and the inner and outer ring is larger than that of the roller and the inner and outer ring in the start-up and operation stages; the heat accumulation of the raceway of the outer ring in the bearing area is more serious than that of the inner ring, and the temperature of the raceway rises faster than that of the inner ring; the difference of heat flux between inner and outer ring is small, and the heat flux in the bearing area of outer ring is relatively stable.