Guniting object depth display device

The utility model relates to a guniting object depth display device, which comprises an expansion screw tube, a bolt and a screw cap, indicating scales are arranged on two sides of the expansion screw tube, the bolt is arranged in the expansion screw tube, a fastening end of the screw cap is of a conical structure, the diameter of a brim of the screw cap is larger than that of the expansion screw tube, and the screw cap is provided with an opening. A guide groove is formed in one end of the expansion screw pipe, a guide hole is reserved in the inner wall of the bottom end of the guide groove, internal threads are arranged on the inner wall of the guide hole, an expansion head is arranged outside one end of the expansion screw pipe, and the expansion head wraps the guide hole in the inner side of the expansion screw pipe in the circumferential direction. The device has guiding significance in guniting operation, the guniting thickness can be observed, acceptance inspection of the guniting operation is facilita