The utility model discloses an underground scratch resistant safety device. A placing guiding slot is arranged at the upper part of a body. An arc slot is arranged at the center of the top of an outside baffle plate of the body, and the other side of the body extends up and down to form parallel upper clamping plate and lower clamping plate. Communicated pin holes are arranged on the upper clamping plate and the lower clamping plate. When in use, the upper clamping plate and the lower clamping plate are inserted on an underground flange to be locked by through pins. The utility model is vertically alignment to the discharging operation surface of an oil tube, the box coupling end of the oil tube is placed in the placing guiding slot, and the operation that an elevator is started to fall down the oil tube can be made. When the oil tube is elevated, the box coupling end of the oil tube is placed in the placing guiding slot, so the box coupling end can be successfully elevated without obstruction, the underground and the underground flange can not be scraped, and operators' injuries can be avoided.