The utility model relates to a cylinder sleeve and piston ring frictional wear testing machine, which adopts a frequency converter to control the rotational speed of a motor and adopts a temperature controller to control the temperature of a heating ring. Radial loading is carried out to a piston ring by using a piston ring radial loading device comprising a loading nut, a screw rod, an inner taper sleeve and an outer taper sleeve; the loaded load magnitude is monitored through the strain of a strain gauge measuring screw rod; and the change of the surface appearance of a cutting blade at the part of the top dead center of the sampling cylinder sleeve is tested during the frictional wear process; the frictional force is measured by a sensor in real time to eliminate the influence of the inertial force of a moving part on the measuring result of frictional force, so that the measured frictional force is more accurate; the temperature of the cylinder sleeve and the piston ring is heated by using the heating ring to simulate the working temperature of the cylinder sleeve and the piston ring; and the surface appearance of the top dead center is measured by the cutting blade of the cylinder sleeve to better simulate the frictional wear performance of the air cylinder and piston rod materials under different operating conditions. The testing machine has the advantages of simple structure, convenient operation, low cost and good practical use.