This thesis analyses a case study on the character of the heroine in the works of the 19th century Italian romantic opera composer Donizetti. The purpose of this study is to analyze Adina and Norina, the representative female characters in Donizetti's opera, from the aspects of character image and music image. At the same time combined with my own experience analysis of its main singing. To understand the artistic characteristics of Donizetti's opera creation, the musical charm of opera characters and the influence of world opera on the development of Chinese music in many aspects.