The invention provides supersonic flame spraying equipment and a spraying method thereof. The supersonic flame spraying equipment comprises an air compressor, a heat exchanger, a main control cabinet,a pressurizing pump, an oil tank, an oxygen bus bar, a machine shell, a base, a powder feeder, an extension pipe, a supersonic fame spraying gun, an angle-adjustable supporting frame, a height position movable adjustment rod, a spattering-preventive collection cover for remaining sprayed powder, a powder pollution-preventive adsorption exporting core and a V-shaped connecting frame. According tothe supersonic flame spraying equipment, a first lining seat, a second lining seat, a joining lining seat, an angle motion bar, a sliding pipe, a third lining seat and a telescopic adjustment rod arearranged; adjustment of the telescopic adjustment rod through extension and contraction is benefited; the sliding pipe slides on the outer wall of the angle motion bar, and at this moment, the angle motion bar moves inside the first lining seat, the inclination angle of the angle motion bar is changed, and the spraying angle of the supersonic flame spraying gun is changed; and finally, extension and contraction work of the telescopic adjustment rod is stopped so that the spraying work can be guaranteed to proceed smoothly.