The invention provides a novel gas-blowing gun, and belongs to the field of mechanical processing auxiliary equipment. The novel gas-blowing gun comprises an enclosure and a switching assembly, and further comprises a bowl-shaped air cover, wherein a gas tube is arranged in the enclosure; the gas tube comprises a gas inlet and a gas outlet; the gas inlet communicates with an air compressor through a corrugated tube; the gas outlet is positioned in a gas outlet end of the enclosure; the switching assembly comprises a valve and a handle connected with the valve; the valve is positioned in the enclosure; the valve communicates with the gas tube; the handle is mounted on the enclosure; the opening of the valve is controlled by pressing the handle; the bowl-shaped air cover is positioned at the gas outlet end of the enclosure; the air cover is detachably connected with the enclosure; a sunken part of the air cover is sunken towards a tail-end direction of the enclosure along the gas outlet end of the enclosure. When the gas-blowing gun works, a clearing area is wide, and the working efficiency is improved; meanwhile, the novel gas-blowing gun is convenient for clearing different regions, and is convenient and quick in operation.