Rock-soil drilling decontamination device and use method

The invention relates to a geotechnical drilling decontamination device and a using method. The device comprises a high-pressure unit, a control unit, a connecting unit and a sweeping unit. The high-voltage unit is used for providing power for the cleaning unit; the control unit is used for controlling the cleaning action of the cleaning unit; and the cleaning unit is used for cleaning the wall of the rock-soil drilled hole. The inner wall of a drill hole is cleaned in a mode of rotating the brush, cleaning is more uniform and thorough, dust on the hole wall is easier to fall off, and therefore the cleaning effect is enhanced; a high-definition camera is installed, so that visualization work is achieved, accuracy and pertinence are achieved, and rapid cleaning is achieved; the drainage of accumulated water in the holes can be realized by replacing and installing the ground rubber pipe with the leakage net; the multifunctional sweeping device integrates multiple functions of blowing, sweeping and sucking, over