The invention discloses a crusher device used for a water conservancy project. The crusher device comprises a foundation rectangular base and a foundation rectangular crushing box body. A primary crushing device is arranged at the upper end of an inner cavity of the foundation rectangular crushing box body and composed of first fixing bearings, a rolling shaft, crushing blades and a driving device. A prismatic-table-shaped collecting chamber is formed in the inner cavity of the foundation rectangular crushing box body, and a secondary crushing device is arranged below the prismatic-table-shaped collecting chamber and composed of rectangular grooves, rectangular through grooves, second fixing bearings, sliding bearings, rotating shafts, rollers, a driving assembly and roller displacement adjusting devices. The roller displacement adjusting devices are composed of movable connection assemblies, compressing springs, locking seats, thread through holes, adjusting screws and adjusting nuts.A control device and an operation panel are arranged at the upper end of the foundation rectangular base. The crusher device has the beneficial effects of simple structure and high practicability.