The invention discloses an automatic single slice feeding device for a punching machine, and belongs to the technical field of punching machines. The automatic single slice feeding device for the punching machine comprises a feeding mechanism, a pushing mechanism and a finger-type mechanical arm; the feeding mechanism is connected with the finger-type mechanical arm to drive the finger-type mechanical arm to make synchronous lifting and swinging motion; and the pushing mechanism cooperates with the finger-type mechanical arm to drive single slice materials to be upwards fed one by one to be matched with the grabbing action of the finger-type mechanical arm. The feeding mechanism comprises a reciprocating driving mechanism, a swinging mechanism and a lifting mechanism; a grabbing mechanismfor grabbing the single slice materials is arranged on the lower portion of a finger-type part of the finger-type mechanical arm; and the pushing mechanism comprises a material fork and a feed mechanism. The automatic single slice feeding device has the main purpose that the processes of feeding and pushing can be synchronously conducted, the automation degree is high, safe operation is easy, reliability of stable operation is high, the product quality is effectively improved, product production benefits are effectively increased, and the labor cost and the production cost of enterprises are saved.