Vehicle-mounted dry powder fire extinguishing device

The utility model discloses a vehicle-mounted dry powder fire extinguishing device which comprises a movable chassis assembly and a dry powder fire extinguishing assembly, the movable chassis assembly comprises a chassis body, crawler belt modules are arranged on the two sides of the chassis body, and a driving module used for driving the crawler belt modules to advance and steer is arranged on the chassis body; the dry powder fire extinguishing assembly comprises a dry powder storage tank, a high-pressure power bottle set and a spraying gun barrel, the high-pressure power bottle set is connected with the dry powder storage tank through a high-pressure gas conveying pipeline, the dry powder storage tank is connected with the spraying gun barrel through a dry powder spraying pipeline, a first control valve is arranged on the high-pressure gas conveying pipeline, and a second control valve is arranged on the dry powder spraying pipeline. The dry powder storage tank is arranged at one end of the chassis body, th