The V belt is a transmission belt with an isosceles trapezoidal cross-section and its working surface is two sides. The V-belt is widely used in the transmission of power on machinery and equipment driven by electric motors and internal combustion engines. With the development of science and technology, the V belt has continued to have corresponding changes in material and structure. It has adapted to the needs of high power, high speed, long life, small deformation, and small space occupancy. Its application scope has become increasingly extensive.