This paper puts forward the principle of lip and nasal deformity correction according to the “from inside to outside” norm in the cleft lip and nasal deformity, which originates from the deep understanding of cleft lip and nasal anatomy, as well as the study and application process to of anatomical points in regularly geometrical movement of lip skin. The development and design of a series of technology to primary and secondary correction of cleft lip and nose with invisible lip incision have been formed achieved, and they have been employed in clinical process, having good clinical effects. The traditional process of cleft lip and nose repair carried out from “the outside to the inside?” was improved now and the understanding of lip and nasal deformity correction has been more thorough.
