Nasal septum refers to the separation between two nasal cavities, which is composed of nasal septum cartilage, ethmoid vertical plate and vomer, and divides the nasal passage into two parts. Deviation of nasal septum means that the nasal septum deviates to one side, bends to both sides or protrudes locally. 40% of people have deviated nasal septum to varying degrees, and only a few people with severe deviated nasal passages will cause ventilation dysfunction and need surgery. Rhinoplasty is to implant a prosthesis made of cartilage or biological materials into the fascia of the back of the nose or the periosteum of the nasal bone to cushion the bridge of the nose and raise the shape of the nose. If the nose is regarded as a house with two rooms, the nasal septum is the partition wall in the middle of the house. The level of augmentation rhinoplasty prosthesis implantation is the upper layer of roof cement slab. Because the roof is a very strong bone, thickening the roof will not affect the structure of the room. Therefore, the deviation of nasal septum will not affect rhinoplasty.