AmbroisePare, a famous doctor in the 6th century, was the first to have cleft lip plastic surgery. His surgical method is to cut off the crack edge first, then penetrate the cut edge with a needle, and then coil the needle with a thread to fix the wound and sew up the incision. His method is similar to that of Wei Yongzhi, an ancient doctor in China, who gave birth to rabbits 1500 years ago. It is backward. At that time, China had adopted suture technique, and the treatment effect must be quite good, so the patient was refreshed after operation and finally became the prime minister (Wei Yongzhi). The main disadvantage of ancient cleft lip repair surgery is that the repaired lip is often too short. Until the19th century, VonGraeffe and Rose used the principle that the arc is longer than the straight line to make the incision into an arc. Finally, the defect that the affected lip is too short after operation is overcome. After Rose's, doctors all over the world changed the arc incision into various arc incisions and formed various tissue flaps accordingly, thus a new surgical method for cleft lip repair appeared. Almost all possible triangular and rectangular flaps are used in modern cleft lip plastic surgery. For example, B 1air-Mirault's triangular flap attachment method (1930), LeMesurier-Hagedorn's rectangular flap embedding method (1949), Tennison's triangular flap embedding method (1952) and Skoog's double triangular flap embedding method. The similarities and differences of these methods are that the incision they designed sacrifices more usable or normal tissues, and there is no human crest in the lower part of the patient because a flat triangular flap or rectangular flap is embedded here. In order to correct this shortcoming, students of B 1air, Brown's and Medwell's (1950) adopted LeMesurier's own operation (1962), but the area of triangular flap and rectangular flap was reduced in each operation. However, a good human crest is still not formed in the lower part of the affected lips. Therefore, Mi Leide (1958) put forward the method of rotating propulsion, and Song Ruyao (1963) put forward the method of repairing the triangular flap of the nasal floor. These two methods can really avoid the obvious flat defect in the middle and lower part of the affected side because the rectangular flap and triangular flap formed in the lower part of the affected side lip are changed to the upper part. However, the same defect appeared in the upper lip of the affected side after repair.