Polycrystalline silicon abrasive filament, which is produced with great hardness resin and special durable material, will improve the durableness of the filament. With great hardness, no border irregularity, polycrystalline silicon abrasive filament is good for rotary brush and pen brush. After being made into brush, it will fit all kinds of imported and domestic grinders. Mainly being applied to the polishing of solar energy products.