Objective To improve the surgical procedure to correctpectus carinatum. Methods From 1990 to 2003, 9 patients with pectus carinatum were treated, whose ages ranged from 3 years and 6 months to 16 years. The conventional operation was performed on 4 patients, the modified procedure on 5 patients. The modified procedure included: ①the shortening rib periosteum was not sutured transversally；② the corrected position of the sternum was stabilized with the metal strut. Results In 4 patients corrected by the conventional procedure, the sternum depression as pectus excavatum occurred in 1 case five years postoperatively. The results were satisfactory in 5 patients corrected by the modified procedure. The reconstructed thorax was symmetrical, without bulging or dimpling of sternum and costal cartilage. Conclusion The improvement of operative method isreasonable and effective in correcting pectus carinatum.