The invention belongs to the field of fans, and particularly discloses an axial flow impeller with splitter blades. The splitter blades are installed between axial flow blades of the axial flow impeller, and blade roots of the splitter blades are connected with a hub of an axial flow fan. The splitter blades are similar to the axial flow blades in shape, the height of the splitter blades is obtained by multiplying the height of the axial flow blades by a height coefficient sigma, and the section of the splitter blades is obtained by multiplying the section of the axial flow blades at the same height by a reduction coefficient tau, wherein the height coefficient sigma ranges from 0.1 to 0.6, and the reduction coefficient tau ranges from 0.3 to 0.7. According to the axial flow impeller, through the improved design of given key parameters, the axial speed near the blade roots can be effectively increased, the area of a tail edge low-speed region is reduced, tail edge separation is weakened, low-energy fluid near an end wall is taken away, the development of passage vortexes and corner separation vortexes is restrained, and therefore the aerodynamic performance of the axial flow fan is improved.