Black masterbatch is divided into general black masterbatch, blown film grade black masterbatch, sanitary/food grade black masterbatch and functional black masterbatch according to different application products. The black masterbatch is made of high-quality high-strength carbon black and additives through high-speed mixing, extrusion and air-cooled pelletizing. After use, the surface of the product has no crystal points and has excellent blackness and brightness. Food-grade black masterbatch is made of imported high-quality carbon black, new polyethylene resin and imported dispersing additives. All raw materials have SGS, ROHS, FDA inspection reports related to hygiene and food. The functional black masterbatch adopts imported carbon black with high blackness and high brightness, and adds compound antioxidants, ultraviolet absorbers, and light stabilizers to extend the service life of the products.