A V-pulley includes a pulley body having a through hole provided at the center. Wheels are connected on the pulley body. An outer wheel is provided at each of two ends of the pulley body. Coaxial annular gears and annular inner wheels are alternately arranged between the two outer wheels. The diameter of a gear is less than that of an inner wheel. The outer wheels, the gears, and the inner wheels are fixedly connected through a connecting structure. The outer circumferential surfaces of the gears have meshing teeth disposed at an interval in a convex-concave manner. Two adjacent wheels and a gear between them form a V-belt groove. The opposite end surfaces of the two adjacent wheels form friction transmission belt groove side surfaces. The gear between the two adjacent wheels forms a mesh transmission gear. The belt groove side surfaces are inclined smooth surfaces.