The spray gun is made of brass, aluminum alloy, engineering plastic, stainless steel and other corrosion-resistant materials, which is not easy to rust. The spray body and the flow stabilizer are formed by drawing aluminum alloy, the inner wall is smooth, and the straightness error of the flow stabilizer sheet is small. The spray gun can rotate at a constant speed in a fan-shaped or full-circle mode, and the adjustable water crusher can generate small and uniform water particles, with high strength and stable operation performance, and is widely used in industrial dust removal and agricultural irrigation.