The whole device includes an engine, a water pump, a spray gun, a water inlet pipe, a high pressure hose and accessories. It adopts a two-stroke engine and brass single-machine impeller design. The pump head is made of ultra-light high-strength anti-corrosion aluminum alloy. It has the characteristics of compact structure, convenience in carrying, stable performance and long conveying distance and the like. It has two different starting methods which can be arbitrarily selected, and are starting by a hand line and electric starting respectively. Different starting modes can be selected according to the actual situation.