Pingyang folk song is a traditional music form in Zhejiang province, which has a unique rhythm and style, usually seven words and four sentences, and is sung in the local dialect. Duet is a kind of folk songs, usually sung by two singers in the form of question and answer, sometimes accompanied by musical instruments. The lyrics of birds are mostly related to birds, describing their appearance, habits and sounds to express people's observation and feelings about nature. This form of folk songs has strong local characteristics and local flavor, and it is one of the important ways for local people to express their feelings in their work, life and social life. In a word, Duiying, as a unique form of Pingyang folk songs, has distinctive artistic features and cultural connotations, and is an important part of Zhejiang's intangible cultural heritage.