Automatic polishing machine is one kind of double disc type machine,which is the new generationg of high precison, the sample preparation process of automated manufacturing using the international advanced technology according to international standards.This machine adopts the advanced microprocessor control system,which makes the grinding disc,grinding head speed atepless adjustable,sample preparation pressure,time setting.The machine is applied more widely with the function of low noise and aluminum base.The machine is applicable to rough grinding,fine grinding,coarse polishing and polishing process as well as it is an ideal equipment for enterprises,scientific research institutions and colleges laboratory.