In the field of music, the term “modernism” usually refers to the significant separation of musical languages ??around the beginning of the 20th century, creating a new set of musical understandings in the musical concepts of harmony, melody, acoustics and rhythm. Modern music (also known as “modernist music” and “modernist music”) refers to music, which consists of new composition techniques, music theory and musical language in the late 19th and 20th centuries, based on non-functional harmony systems. basis. Support traditional composing techniques. Not all musical works were created in the 20th century.In professional music terms, modern music (modernist music) refers to all professional music creations after the Impressionist music of the late 19th and early 20th centuries. From the perspective of historical style, modern music refers to the non-traditional composition skills and non-functional harmony systems as the theoretical support of 20th century music works. Not all musical works were created in the 20th century. Unlike traditional music systems and popular music systems, the two pure music systems are music systems. The unique modern harmony has gradually formed as a theoretical support. Music has complex harmonic structures, mostly tonal, multi-tone,non-tonal music.