In order to improve the lubricating performance of highly intensified diesel engine oil,nano serpentine powder,antiwear additive ZDDP and friction reduction additive MoDTC were mixed to analyze the syngergistic lubricating performance on the ringblock friction test rig.The influence of additives composition on friction coefficient,wear and chemical composition of friction products was discussed.Results indicate that the mixture of serpentine powder,MoDTC and ZDDP can reduce the friction coefficient and wear of lubricant,as well as the wear scar on friction surface.The serpentine powder produce selfrestore layer on the friction surface,which improve the surface hardness and antiwear performance.When serpentine powder is compounded with MoDTC and ZDDP,the serpentine powder promotes the formation of MoS2 on the friction surface and further reduces the friction coefficient,which indicates that serpentine powder,MoDTC and ZDDP play a synergistic role in reducing friction.