Dual-staging dinscharge-type plastic particle-out extruding meching shall be designed into tshaped or parallel-shaped structure,which is widely applicable to various plastic such as hi-pressure polyethylene(LDPE),lower-pressure polyethylene(HDPE),polypropylene(PP),polystyrene(ps) and ABS etc,the design include air discharge unit so as to discharge the gas created after material was heated,such that particle shall be made mor full,durable and smooth etc,mold shall be designed with hydraulic elevation fast-replacing filtering mesh(without any shutdown while operation),featuring much greater improment for productivity