High-efficiency permanent plastic antibacterial masterbatch, suitable for various plastic products such as PP, PE, ABS, PC/ABS, HIPS, PC, TPU, TPE, etc. After testing by SGS company, adding 4% antibacterial masterbatch is produced in plastic. The product has a killing rate of more than 99.9% on Escherichia coli, Staphylococcus aureus and other bacteria, does not affect the physical properties and color of the product, and greatly increases the added value of the product.