Screw hole scrap iron cleaning device and using method

The invention discloses a screw hole scrap iron cleaning device and a using method, and relates to the field of wind turbine generators, in particular to the screw hole scrap iron cleaning device and the using method. The upper end of the main air pipe is provided with an air inlet end used for introducing high-pressure air flow, the middle of the main air pipe is provided with a chip removal pipe, and the flow dividing nozzle is arranged in the main air pipe, extends to the middle of the chip removal pipe and is used for guiding the high-pressure air flow introduced by the main air pipe to the chip removal pipe and forming negative pressure at the lower end of the main air pipe. The outer diameter of the lower end of the main air pipe is smaller than that of the inner wall of the screw hole. The device has the advantages that by means of air fluid mechanics characteristics, after high-pressure inlet air is shunted through the structure in the device, one part of high-pressure air is used for forming a negati