The piston pin bore bushing-piston pin is one of the important frictional components of diesel engine,and its matching performance directly affects the service life and power characteristics.In order to investigate the matching performance of the piston pin hole bushings with different manufacturing processes with piston pin in use in diesel engines,the piston pin hole bushings prepared by extrusion and spinning processes and the imported bushing were matched with the piston pin in use in diesel engines,the load-bearing,anti-seize and wear resistance tests were carried out in the oscillating friction test bench.The test results show that the preparation process has a certain influence on the matching performance of the friction fairs.From the four aspects of friction torque,friction temperature,macroscopic morphology and wear amount,the extruded bushing has better bearing limit,anti-seize performance and wear resistance than the spinning bushing under the same working conditions,and can be used in place of imported bushings,which can provide reference for the matching of domestic piston pin hole bushings.