The art of music has a long history since its development from a relatively long time. It can not only bring the viewers a more shocking thought, but also enrich people's spiritual and cultural world. And national music is also a kind of art with national characteristics, which originates from life and is also higher than life. The theory of composition technology is of great significance to the development of national music. This paper mainly analyzes the theory of composition technology and its application in national music, discusses and analyzes the role of composition technology theory in national music, hoping to have some enlightenment on promoting the inheritance, innovation and development of national music and stimulating the contemporary value of national music.