鉴于Ⅱ°及Ⅲ°唇裂应用常规术式效果不够满意。本文介绍了延伸旋转推进改良法在修复先天性单侧唇裂，尤其是Ⅱ°及Ⅲ°唇裂中的应用及改进，并进行了讨论。临床实践证明，作者改进的方法增加了两个三角瓣，并采用大尖端的“Ｂ”瓣和不反转的“Ｃ”瓣，治疗效果较好，值得借鉴 In view of Ⅱ ° and Ⅲ ° cleft lip application of conventional surgical results are not satisfactory. This article describes the application of extension rotation propulsion modified method in the repair of congenital unilateral cleft lip, especially Ⅱ ° and Ⅲ ° cleft lip in the application and improvement, and is discussed. Clinical practice has proved that the authors improved the method of adding two triangular flap, and the use of large tip “B” flap and non-inverted “C” flap, the treatment is better, it is worth learning