Abstract:Because of its advantages such as small friction force, convenient maintenance and so on,rolling bearings are widely used in industry, agriculture, national defense and hightech field. Disassembling and assembling method of rolling bearings is very important,which has bearing on expected performance index of main engine, due lifetime and accuracy and using & maintaining cost. Pressure method, hydraulic method and temperature difference method are commonly used. Based on analyzing advantages and disadvantages and various application situations of pressure method and hydraulic method, temperature difference method was introduced in detail.