The invention relates to the technical field of magnetizer magnetizing, in particular to an automatic magnet magnetizer. The magnet magnetizer comprises a machine table, a feeding mechanism, a transferring mechanism, a guiding mechanism and a magnetizing mechanism; the feeding mechanism, the transferring mechanism, the guiding mechanism and the magnetizing mechanism are arranged on the machine table, a jacking assembly lifts magnetizers supplied by the feeding mechanism to be flush with the guiding mechanism, a pushing assembly pushes the magnetizers jacked by the jacking assembly into the guiding mechanism, and an electronic counter calculates the number of the magnetizers entering the guiding mechanism; the pushing assembly comprises a first bracket, a thimble arranged in a sliding manner, a first cam arranged in a rotating manner, a first driving part for driving the first cam, and a first elastic part for driving the thimble to prop against the first cam; the other end of the thimble props against the magnetizer lifted by the jacking assembly to enter the guide mechanism; the jacking assembly and the pushing assembly are matched to achieve automatic one-by-one feeding of the magnetizers, so the magnetizing mechanism can magnetize the magnetizers arranged in a stacked mode at a time, the magnetizing efficiency of the magnetizers is improved, and then the manufacturing efficiency of the magnets is improved.