Screening device for crusher

The utility model discloses a screening device for a crusher. The screening device effectively solves the problem that the manufacturing cost is high due to the fact that multi-stage screening needs to be driven by a plurality of vibrators. Comprising a shell, receding grooves are formed in the upper side and the lower side of the shell respectively, a vibrating screen is arranged in the movable grooves, two connecting rods which are opposite left and right are arranged on the front side and the rear side of the screen respectively, and a plurality of movable holes corresponding to the connecting rods one to one are formed in the front side and the rear side of the shell respectively; the multi-stage screening device is ingenious in structure and convenient to use, the double-end motor, the vibrating rod, the rotating shaft, the eccentric disc, the crank, the driving rod, the swing rod, the pull rod, the key-shaped groove, the key-shaped rod and the connecting frame are arranged, the double-end motor can driv