Efficient and accurate manual hole measuring device for downward deep hole

The utility model discloses an efficient and accurate manual hole measuring device for a downward deep hole, which comprises a support frame, the upper part of the support frame is hinged with a winding drum, and one end of the winding drum is connected with a rocking handle; a nylon steel wire hemp measuring rope is arranged on the winding drum; the guide rod is connected with the support frame and is positioned below the winding drum; the guide rod is provided with a threading hole, and the nylon steel wire hemp measuring rope penetrates through the threading hole and extends to the positionbelow the guide rod. And the upper reference plane calibration assembly comprises a vertical rod, a sliding block and an infrared laser receiver. The efficient and accurate manual hole measuring device for the downward deep hole is simple, convenient, easy to operate, capable of efficiently and accurately measuring the height of the deep hole, capable of strictly controlling the charging accuracyof the deep hole within a