The invention relates to a rotating type flaw detection injection molding machine die. The die comprises a movable die portion, a fixed die portion, a rotating base, a supporting box body, a rack, a stepping motor, an electromagnetic flaw detection instrument, an industrial camera, a master controller and a rotating motor. A plurality of push-and-pull rods are mounted between the movable die portion and the fixed die portion, and the rotating base is mounted at the bottom of the fixed die portion; the supporting box body is mounted at the bottom of the rotating base, and a plane bearing is arranged between the supporting box body and the rotating base; the central position of the lower face of the rotating base is in shaft joint with the rotating motor; a transverse beam of the rack is fixedly arranged on the outer wall of the side face of the supporting box body, and a rack vertical beam is provided with a rotating shaft; the rotating shaft is driven by the stepping motor, and the electromagnetic flaw detection instrument and the industrial camera are mounted on a cross beam at the front end of the rotating shaft; and the electromagnetic flaw detection instrument and the industrial camera are connected with the master controller through a cable. By means of rotation of the rotating die, fluidity and dispersion of molten body materials in a cavity are increased, and the yield rate of a casting product is improved.