The invention discloses a multi-functional lane liquid nitrogen fire extinguishing vehicle, which is fire fighting equipment, consists of a track chassis provided with rail wheels or automobile wheels, a liquid nitrogen storage, a normal temperature carburetor, a vacuum insulation pipe, a gas spraying hose, a direct current spotlight, a respiratory oxygen supply device and so on, and has no power system. The fire extinguishing vehicle adopts a method that liquid nitrogen is carburated and then forms refrigerated nitrogen to submerge a coal layer to reduce the temperature of the coal layer and cause the oxygen deficiency of the coal layer and a lane to extinguish fire according to physicochemical properties that the liquid nitrogen has ultra-low temperature, nitrogen is incombustible, and the fire extinguishing by the nitrogen has no smoke and smell and does not generate ozone, and can deeply enter the inside of the lane for flexible mobile operation under the traction of a coal mine locomotive or the pushing of manpower, so the fire extinguishing vehicle has the characteristics of simplified structure, complete function, large gas supply amount, flexibility and convenience when entering the lane for fire extinguishing operation, environmental-friendly fire extinguishment, energy-saving fire extinguishment, instantly-effective fire extinguishment and so on, is applicable to the fire extinguishment of coal mine lanes, and is also applicable to the fire extinguishment of other lanes or large occasions.