This is a studying on Chinese round neckline. Chinese round neckline is originate from Kucha and Bei-Wei. After round neckling was flown into Chinese, it had been worn in all classes including Emperor as well as common people. Women-talents and court ladis-likes to wear it too, especially Tang Dynasty. This study is describe processes of changes and characters of Chinese. The first inflow time of round neckline into China was assumed in Bei-Wei. In Bei-Chi, it changed right lapel and it fastened by a button. In Chinese each dynasty, Round neckline had been worn in Emperor, common people talents and a part of court ladies.