Answer: (1) Music enters the court from the church, and gradually moves towards the society and the people. (2) Music creation is no longer dominated by polyphony, but is written in the form of main melody. (3) Establish the principle of musical form segmentation structure, and the melody forms a square phrase structure with short and symmetrical 2 and 4 bars as the basic unit. (4) Motivated development of theme, replacing the modular development of single theme in Baroque period with the contrast between themes. (5) basso continuo was replaced by clear musical notation. (6) Broaden the range and expressive force of music. (7) The focus of music is shifted to symphony, sonata and other instrumental genres.