This paper proposed to prepare a composite nanometer self-lubricating diamond grinding wheel， and conducted a grinding test of SiC ceramics， and analyzed the influnence of the composite nanometer self-lubricating diamond grinding wheel with different mass fractions of composite nanoparticle on grinding performance. In this paper， nano-MoS₂， TiO₂ particles were selected as the filling materials， and a composite nano self-lubricating diamond grinding wheel and a traditional grinding wheel were used for comparison grinding experiments. At the same time， the lubrication mechanism of the composite nano-self-lubricating diamond grinding wheel was studied. The results show that the self-released nanoparticles of the grinding wheel effectively participate in the lubrication of the grinding area， reduce the normal and tangential force on the grinding wheel， and improve the surface quality of the workpiece. In the grinding depth of 2-8 μm，the specific performance is that the normal and tangential grinding forces of the composite nano self-lubricating diamond grinding wheel are effectively reduced by 18.6%-38.7%， 11.2%-28.6%， and the surface roughness is reduced by 13.9%-41.5%. When the mass fracture of composite nanoparticles is 8%， the performance and surface quality of the workpiece are the best.