The growth of piglets is particularly fast after the tail is broken, which is 10% higher than that of normal pigs, and it is slaughtered 10 days in advance - 15 days in advance. The method is as follows: Prepare a high-temperature sterilized scalpel, single-sided blade and alcohol, cotton wool, and gentian violet before surgery. Surgery should be performed within 1 day - 2 days after the birth of the piglet. During the operation, the two men cooperated. The assistant grasped the hind legs of the piglets and separated them by approximately 60 degrees with the tail facing up. The surgeon held the tail in one hand and the scalpel in the other hand. The pigtail was cut at 1.5 cm from the base of the tail and the movement was faster. After truncation, quickly stop bleeding with a purple lotion on the wound. When performing surgery on the next pig, the scalpel must be disinfected again. 2 days - after 3 days the pigtails can heal. After the operation, attention should be paid to the disinfection of the wound and the heat preservation of the piglets, so as to prevent the piglets from being pressed or the sow to be pressed when the sows turn around. After the piglet is cured, it can be reared and managed like a normal piglet.