Breaking device for stagnant discharge prevention pipeline of slurry shield

The utility model discloses a slurry shield anti-stagnant discharge pipeline crushing device which comprises a screening box, a screening net, a crushing box, a crusher, a bypass pipe and a slurry discharge pipe, the side face of the screening box is communicated with the crushing box, the bottom of the screening box is communicated with the bypass pipe, and a crushing mode and a direct discharge mode are arranged and correspond to two paths respectively. According to the first path, slurry enters the bypass pipe at the bottom through the screening box and then is directly discharged from the slurry discharging pipe at the bottom of the device, and according to the second path, when the slurry passes through the screening net in the screening box, large muck fragments are screened out, and the fragments fall into the crusher communicated with the crushing box at the bottom through the crushing box on the side face. The two treatment modes are switched and combined for use through the gate valve, and the devic