Crushing device and slurry balance shield machine

The embodiment of the utility model relates to a crushing device and a slurry balance shield tunneling machine, and belongs to the technical field of tunnel construction equipment. The embodiment of the utility model aims to solve the technical problem that all parts of a driving mechanism in the prior art are easy to loosen and damage too early. The crushing device is located in a shield body, the shield body is provided with an excavation cabin and an air cushion cabin which are communicated, and a first through hole is formed in a second partition plate of the air cushion cabin; the crushing device comprises a rotating shaft, a crushing part and a driving mechanism, and the rotating shaft penetrates through the first through hole and is rotationally connected with the second partition plate; the crushing part is located in the air cushion cabin and connected with the first end, located in the air cushion cabin, of the rotating shaft. The driving mechanism is located outside the air cushion cabin and connec