Large plastic crushing device applied to plastic machinery

The invention relates to a large-scale plastic crushing device applied to plastic machinery. The large-scale plastic crushing device comprises a crusher body, the at least two first rotating rods are rotationally arranged in the opening in the top of the crusher body in parallel; the cutting blades are fixed on the first rotating rod at intervals; the driving mechanism is suitable for driving the at least two first rotating rods to rotate synchronously; the filter plate is arranged below the cutting blade and is suitable for filtering the cut plastic; the swinging mechanism is suitable for driving the filter plate to swing, so that the plastic placed on the filter plate is in contact with the cutting blade for secondary crushing; when plastic is not completely cut, a rotating wheel is rotated, through cooperation between a driving gear and a driven gear, the other end of a first connecting rod is driven to do reciprocating motion, and through cooperation between second connecting rods on the two sides and the