Vehicle-mounted dry powder fire extinguishing device

The invention discloses a vehicle-mounted dry powder fire extinguishing device. The vehicle-mounted dry powder fire extinguishing device comprises a bracket, and a fire extinguishing cylinder arranged on the bracket, wherein the fire extinguishing cylinder comprises a cylinder body; a gas generator is arranged at one end of the cylinder body, and a nozzle is arranged at the other end of the cylinder body; a dry powder fire extinguishing agent is filled in the cylinder body between the nozzle and the gas generator; an aluminum film for blocking the nozzle is arranged at the outer side of the nozzle; an atomizing ring is arranged at the outer side of the aluminum film; and a blocking ring in threaded connection with the cylinder body is arranged at the outer side of the atomizing ring. The vehicle-mounted dry powder fire extinguishing device has the beneficial effects of reasonable structure design, capability of preferable sealing, difficult leakage under the condition of frequent vibration, vibration resistance, high-temperature resistance, good fire extinguishing effect and capability of adapting to vehicle environments.