Chopin founded a new school of piano playing, and enriched the piano playing skills with new artistic content and unprecedented performance. Because the data expression of music is a complex problem based on the multi-dimensional arrangement and combination of time series, based on the common characteristics of different styles of music, this paper compares the music score versions of Chopin etudes based on DL(Deep Learning), compares three performers and compares the sound versions, and finds that Chopin's melody is the most prominent in strength, with strong timbre. The bass melody of Boli version, Franç ois and Magalov is also outstanding, but the intensity is not so exaggerated. The results of this research are extended to the research and development of other composing system modules, which can effectively improve the efficiency and calculation results of machine DL. Obviously, there will be similarities and differences in the understanding and processing of the works, so it is very important to choose the version in piano teaching or performance.