The invention relates to a light high pressure water mist fire engine with spray gun-combined sprinkler, which can effectively solve the problems present in current fire engines and comprises the technical proposal that: the light high pressure water mist fire engine comprises a carriage, a driving room and a chassis, wherein the lower part of the chassis is provided with front and rear wheels, the chassis is equipped with a high pressure water mist fire extinguishing device assembly at the front part, a water tank assembly at the middle part and a high pressure winch assembly at the rear part, a skeleton assembly and a covering skin are additionally mounted on the periphery of the chassis to from the carriage, an electronic alarm and a red warning lamp are placed above the driving room, a water outlet of the high pressure winch assembly is equipped with a high pressure water mist spray gun assembly, a water outlet of the fire water tank assembly at the middle part of the chassis is equipped with a filter assembly communicated with the high pressure water mist fire extinguishing device assembly, and a water outlet of the high pressure water mist fire extinguishing device assembly is communicated with a water intake end of the high pressure winch assembly; the light high pressure water mist fire engine has the advantages of simple structure, low cost, easy production, convenient and flexible installation and use, wide applicable range, small water consumption and good economical and social benefits.