The invention discloses a stamping fixture for a rear end panel of an automobile. The stamping fixture comprises a fixed seat; the upper end of the fixed seat is fixedly provided with a supporting tube; a screw is arranged in the supporting tube; the inner wall at the opening position of the upper end of the supporting tube is fixedly sleeved and connected with a positioning nut in threaded connection with the screw; the inner wall near the upper end of the supporting tube is fixedly sleeved and connected with a first ball bearing, and the inner wall of the first ball bearing is fixedly sleeved and connected with a driven helical gear; a through hole is formed in the surface of the driven helical gear, and the driven helical gear sheathes the screw through the through hole; a thread matched with the screw is arranged in the through hole; a positioning hole is formed in the side wall of the supporting tube; the interior of the positioning hole is rotatably connected with a telescopic rotating rod through a second ball bearing; and one end, extending into the supporting tube, of the telescopic rotating rod is fixedly connected with a drive helical gear matched with the driven helicalgear. The stamping fixture is convenient to operate, steady to clamp, convenient to adjust in height, wider in application range and cost-saving.