The invention discloses an automatic magnetizing machine. The automatic magnetizing machine comprises an operating assembly and a detecting assembly, the operating assembly comprises a rotary vibrating screen and a feeding channel connected with the rotary vibrating screen, the other end of the feeding channel is provided with a pushing block, the pushing block is arranged on the upper portion a magnetizing head, a pressing block and a jacking block are arranged above and below the magnetizing headrespectively, the pushing block, the pressing block and the jacking block are connected with power devices driving the pushing block, the pressing block and the jacking block to move respectively, the detecting assembly is electrically connected with the operating assembly and comprises detectingdevices arranged at the pressing block and the jacking block respectively, and the detecting devices are connected with display screens capable of displaying magnetic values respectively. The automatic magnetizing machine replaces a manual operating mode, and the processing efficiency is high; the magnetic values of the upper and lower ends of a workpiece can be detected in real time, the magnetizing defects caused by improper placement of components, vibration of the components, poor contact between magnetizing heads and the components and other factors are avoided, the magnetizing efficiency is improved, the magnetizing success rate is increased, and the automatic magnetizing machine is applicable to mass production operation.