The invention provides a die for making an automobile alternator claw-pole, and belongs to the technical field of die casting dies. The problems of low making accuracy and low processing efficiency of present claw-poles are solved. The die for making the automobile alternator claw-pole comprises an upper die and a lower die, a cavity matching with the shape of a claw-pole with a magnetic rib and a magnet yoke exists between the upper die and the lower die after the upper die and the lower die are applied, the center of the lower die is vertically provided with a through lower through hole, a return material sliding column is arranged in the lower through hole, and the upper surface of the return material sliding column matches with the bottom of the magnetic yoke. The die for making the automobile alternator claw-pole has the advantages of uniform wall thickness and good consistency of produced claw-pole magnetic ribs, and high processing efficiency.