This device has high-pressure and high-efficiency water mist fire-extinguishing performance. It can be carried on the shoulder and is portable, light and flexible, high in maneuverability, convenient to use, and high in fire extinguishing efficiency. It is suitable for individual fire fighting or multiple firefighters’ cooperation in large-area fire fighting. The whole device is composed of a Honda gasoline engine imported with original packaging, an Italian original high-pressure water pump, a pressure-regulating valve, a speed reducer, a combined spray gun capable of automatically switching different spray forms, a copper high-pressure single double-hole nozzle, three water bags, a bracket, straps, a machine case, etc.