The invention relates to a high-pressure water-mist crosscountry firefighting vehicle which can be used for effectively solving the problems of high water consumption, water supply difficulty and poor firefighting effect. The technical scheme adopted by the invention is as follows: the vehicle comprises a crosscountry vehicle chassis, a high-pressure water-mist pumping set assembly, a water tank, a compartment, a reel and a high-pressure spray gun, wherein a cab, a firefighting ladder and the compartment are arranged on the chassis from left to right sequentially; the high-pressure water-mist pumping set assembly is arranged in the front of the compartment, the water tank is arranged in the middle of the compartment, and the reel, a miniature generator, the high-pressure spray gun and a searching lighting lamp on the top are arranged on the rear part of the compartment; an electric alarm and a red warning lamp are arranged above the cab of the chassis; a filter which is communicated with the water inlet of the high-pressure water-mist pumping set assembly is arranged at the water outlet of the water tank in the middle of the chassis; the water outlet of the high-pressure water-mist pumping set assembly is communicated with the water inlet of the reel; and the water outlet of the reel is communicated with the high-pressure spray gun or a high-pressure water-mist mobile monitor. The high-pressure water-mist crosscountry firefighting vehicle has the advantages of unique structure, good use effect, energy conservation, high efficiency and good firefighting effect, and is innovation of firefighting equipment.