Bach created all musical genres in the Baroque period except opera. One of his characteristics is the close combination of polyphonic texture and rich harmonic texture. No matter how many voices there are in the work, their respective melodies all progress simultaneously with equal status, and they all follow the overall progression of the chords at the same time. This reflects the characteristics of the transition from polyphonic music to tonal music in the Baroque period.

Bach’s works clearly reflect the single-emotional characteristics of Baroque music. He likes to decorate and develop a piece of music based on one idea, no matter how intricate, unpredictable, or highly modified his melody is. , they all have a unified mood, and this unity is often maintained by continuous rhythm.

Bach liked to use musical symbols to describe musical ideas. For example, using a bass line to express "The Fall of Adam", or playing a theme ten times to express the "Ten Commandments" of the Bible, etc. This is also a characteristic of the music of the Baroque period.