Fire extinguishing device

The fire extinguishing device comprises a climbing rod assembly, the climbing rod assembly comprises a first climbing rod and a second climbing rod, the bottom end of the first climbing rod and the top end of the second climbing rod are connected through a connecting disc and a bolt, a crank arm is fixed to the top end of the first climbing rod, and a window breaking device is arranged at the other end of the crank arm; the transverse rod is rotationally connected with the bottom end of the first climbing rod through a rotary fastener. When in use, the fire extinguishing device can be mounted in a lower window hole in the lower layer of a room to be extinguished, the first climbing rod is driven by the second climbing rod to rotate along the rotary fastener to drive the window breaker to break window glass of the room to be extinguished, and fire extinguishing gas or liquid in a fire extinguisher on the lower layer is sprayed out from the rotary spray head through the high-pressure pipe; the whole operation p