The invention discloses a gun type fire extinguisher. The gun type fire extinguisher comprises an arc hole emitting cylinder with an arc hole, an insurance cover, a fire extinguishing medium cylinder, an arc hole emitting arc hole emitting, a striking igniting device, buffer fillers, a cartridge receiver, a manual insurance assembly, a clamping locking assembly, a limiting assembly and a handle. According to the gun type fire extinguisher, strong superposition type storm stream is generated by fire extinguishing mediums and air resistance by virtue of shock waves generated by high pressure airflow instantaneously generated by propellant powder so as to instantaneously extinguish a fire source. The gun type fire extinguisher is a non-standard device and is compact and reasonable in structure configuration, light, convenient, general, safe and reliable, the shot range is relatively long, and the effective fire extinguishing area is large; the gun type fire extinguisher can be used in various complicated environmental climate conditions, such as small-space urgent dangerous scenes including indoor scenes, vehicle-mounted scenes and the like.