Double-rank recycled plastic extrusion granulator design have exhaust device, can repeat material heated produced gas discharge, and after two filter material, make filtering impurities made more firm, smooth, frain is pure. This mahcine suitable for PA6, ABS, PS, polypropylene(PP) high pressure polyethlene (LDPE), low pressure polyethylene (HDPE) after cleaning the optional hydraulic elevator non-stop exchange screen device and electric lift machine hand change Filter net device. Screw speed optional transform speed and speed-regulate pulleys.