Abstract: objective:To evaluate the value of multislice spiral CT-Chest Scan in costal cartilage augmentation rhinectomy. Methods: 120 patients undergoing autologous costal cartilage augmentation rhinorrhea were examined by multislice spiral CT before operation, and various three-dimensional reconstruction was performed to analyze whether the autogenous costal cartilage was in accordance with the surgical standard. Some cases were reviewed and evaluated by CT after operation. Results: CT accurately evaluated 28 cases of non-calcification of costal cartilage(grade 1) and 62 cases of mild calcification(grade 2), all of which could be performed augmentation rhinectomy with autologous costal cartilage. 23 cases of moderate calcification(grade 3), of the 23 cases, 12 were avaiable. The remaining 11 cases and all severe calcification(grade 4) 7 cases gave up costal cartilage directly and performed augmentation rhinoplasty with ear cartilage replacement. At the same time, 3 cases of forked ribs, 7 cases of partial fusion of costal cartilage, 1 case of endoscopic right heart with visceral torsion and 2 cases of pulmonary space occupying lesions were also found. Conclusion: multislice spiral CT and various three-dimensional reconstruction are the first choice of imaging examination for patients who want to perform augmentation rhinectomy with autologous costal cartilage. It can accurately evaluate whether there is calcification and degree of autochial cartilage, and can accurately measure the actual course, length, width and thickness of each costal cartilage, which can provide reliable preoperative imaging information for costal cartilage augmentation rhinectomy. At the same time, it can also evaluate the effect of transplantation and detect complications after operation and so on.