Taking high temperature selflubricating cylindrical roller made of Sn-Ag-Cu/metal ceramic high temperature internal gradient lubricating layer and thrust roller bearing as the research object,the high temperature rolling resistance coefficient of the self-lubricating roller bearing was investigated through experiments.The influence mechanism of different load on high temperature rolling resistance characteristics of bearing was analyzed.The results show that the lubricant components of self-lubricating roller reaches to friction contact surface under 600 ℃,and the high temperature lubricating film is formed on the roller and raceway surface,which ensure the low rolling resistance coefficient.High temperature roll resistance coefficient is affected by the load,and the friction coefficient is below 0.02 when the test load is within the range from 100 N to 200 N.When the load increases to 300 N,the friction coefficient rises to 0.05.The integrity of the lubrication film on the contact surface of the bearing is decreased with the increase of load.The surface adhesion between the roller and the raceway is intensified,which greatly affects the rolling resistance characteristics of the bearing,and the adhesion is the main reason for the failure of lubrication film and the rise of rolling resistance of the bearing.