Aluminum profile punching die

The utility model relates to the technical field of aluminum profile machining, and discloses an aluminum profile punching die which comprises an upper die plate, a connecting block is fixedly connected to the bottom of the upper die plate, U-shaped plates are fixedly connected to the left side and the right side of the connecting block, supporting plates are arranged on the inner walls of the U-shaped plates and the bottom of the connecting block in an attached mode, and the supporting plates are arranged on the upper die plate. A through hole is formed in the supporting plate, a first groove is formed in the bottom of the U-shaped plate, ejector pins are arranged on the inner wall of the first groove and the inner wall of the through hole in an attached mode, limiting blocks are fixedly connected to the surfaces of the ejector pins, and a second groove is formed in the bottom of the connecting block. Through cooperation of the connecting block, the U-shaped plate, the supporting plate, the through hole, the