The invention discloses a foreign substance examination turntable system, which comprises a spindle, a spindle seat, a turntable, a pressure plate, a pressure bar and a pressure bar lifting unit. Thespindle is rotatably arranged on the spindle seat. The turntable and the pressure plate both fixedly sleeve the spindle, and the pressure plate is arranged above the turntable. The pressure bar penetrates through the pressure plate. The pressure bar lifting unit comprises a pedestal, a mounting shaft, a cam and a connecting rod. The cam sleeves the upper end of the mounting shaft, the lower end ofwhich axially penetrates through the spindle and extends out to be connected with the pedestal. One end of the connecting rod is fixedly connected to the pressure bar, and the other end of the connecting rod is provided with a pressure bar bearing which can move on the cam and drive the connecting rod to move up and down. By installing the turntable and the pressure plate on the same spindle, synchronous movement of the turntable and the pressure plate can be guaranteed; with the mounting shaft penetrating through the spindle for installation of the cam, the layout is reasonable and the structure is compact; and as the pressure plate is separated from the cam and the location of pressure plate is fixed instead of hanging on the top of equipment, the structure of the equipment is simplified.