Dustbin with automatic smoke extinguishing and large garbage crushing

The invention discloses a dustbin with automatic smoke extinguishing and large garbage crushing. The dustbin includes a placement block, a first placement cavity is formed in the placement block, anda garbage crushing mechanism is arranged in the first placement cavity. The garbage crushing mechanism includes a fixed plate fixedly connected to the inner wall of the rear side of the first placement cavity, a second placement cavity is formed in the upper side of the fixed plate, and the second placement cavity is internally provided with a driving shaft fixedly and rotatably connected to the inner wall of the left side of the placement block. The driving shaft is provided with a fixedly-connected first winding wheel. The dustbin is provided with a crushing device, large garbage can be putinto a crusher by stepping on a switch to realize the collection of the large garbage, a separate cigarette butt collection cavity is formed and a smoke extinguishing device is arranged, cigarette butts can be thrown into the