Masterbatch is composed of carrier resin, filler and various additives. The limit of the adjuvant in the masterbatch or the content of the filler is several to ten times higher than the requirement in the actual plastic product. In the molding process, the proportion of the masterbatch and the matrix resin must be adjusted according to the content of the relevant components in the masterbatch and the amount of the actual product to be added. Masterbatch can be generally divided into ordinary filling masterbatch (referred to as filling masterbatch) and functional masterbatch, such as masterbatch, anti-droplet masterbatch and so on. The main components of the filled masterbatch are fillers, which are mainly used for the processing of polyolefins (polyethylene and polypropylene), also known as polyolefin-filled masterbatches.