Axial flow fan blade, axial flow fan and air conditioner

The invention relates to an axial flow fan blade, an axial flow fan and an air conditioner. The blades are arranged on the peripheral side of the hub; the blade is provided with a blade root, a blade top, a front edge and a rear edge, the blade root is connected to the peripheral side of the hub, and the front edge and the rear edge are oppositely connected between the blade top and the blade root; wherein the rear edge is provided with a plurality of sawteeth, and the sawteeth are connected through arc sections; the rear edge is divided into a plurality of adjacent edge areas in the direction from the blade root to the blade top, the radians of the arc sections in the same edge area are equal, and the radians of the arc sections in different edge areas are gradually increased in the direction from the blade root to the blade top. The axial flow fan comprises the axial flow fan blade and an air guide ring, and the axial flow fan blade is arranged in the air guide ring. The air conditioner comprises the axial