Vibrating screen with multi-stage screening capacity

The utility model discloses a vibrating screen with multistage screening capacity, which comprises a vibrating screen, a plurality of fixing blocks and screening plates, the number of the screening plates is three, the screening plates are uniformly distributed in an inner cavity of the vibrating screen, the number of the fixing blocks is multiple, the fixing blocks are uniformly distributed on the front side and the rear side of the inner cavity of the vibrating screen, and placing grooves are formed in inner cavities of the fixing blocks. Through cooperative use of a vibrating screen, a fixing block, a screening plate, a containing groove, a positioning mechanism and a transmission mechanism, the problems that in the existing screening plate mounting process, mounting and fixing need to be conducted through a plurality of threaded assemblies, the mounting process is tedious, and it is inconvenient for a user to quickly mount the screening plate; and when waste plastic bottles with different sizes are screen