Vehicle-mounted water mist fire extinguishing device

The utility model relates to a vehicle-mounted water mist fire extinguishing device which comprises an integrated high-pressure pump set and an integrated spray gun set which are mutually connected through a pipeline, the integrated high-pressure pump set integrates a pump motor, a high-pressure pump, a driver, a foam fire extinguishing agent electromagnetic valve, a biological fire extinguishing agent electromagnetic valve and a liquid storage tank, the overall size is small, the occupied volume is greatly reduced, and the vehicle-mounted space is saved; the foam extinguishing agent, the biological extinguishing agent and the water are quickly and uniformly mixed by utilizing the pressure difference between a low-pressure inlet and a high-pressure outlet of the high-pressure pump. The integrated spray gun set comprises a water mist spraying system and a water jet spraying system which are arranged in parallel, and two fire extinguishing spraying states of water mist and water jet can be freely switched accor