The auxiliary arm granulator for extruders utilizes special screw design and various configurations, suitable for producing recycled and colored granules of various plastics such as PP, PE, PS, ABS, PA, PVC, PC, POM, EVA, LCP, PET, and PMMA. The reducer features a high-torque design for noiseless and stable operation. The screws and barrels are treated with special hardening, offering excellent wear resistance, good mixing performance, and high production capacity. The design of the vacuum exhaust or normal exhaust port allows for the removal of moisture and waste gases during production, ensuring more stable discharge, denser granules, and guaranteed product quality.