The work," Johann Christoffe," was called a musical epic because it had an important position in the history of music and was widely regarded as one of the representative works of Western classical music. The music style of this work was very rich and varied, including symphony, orchestra, chamber music, solo and many other forms. Its musical structure is also very complex, including many complex symphonies and chamber music parts, as well as magnificent choral and solo parts. These characteristics made John Christoff a very challenging and enjoyable work. The music of " John Christof " was also full of profound meaning and emotional expression. Its symphonies and orchestras often expressed concern for the fate of mankind and hope for the future, while the chorus and solo parts conveyed this emotion by expressing human emotions and beliefs. These characteristics made the music of "John Christof" not only a musical work, but also a work with ideology and cultural content. In summary, Johann Kristoff was considered a musical epic because it had an important position in the history of music and was widely regarded as one of the representative works of Western classical music. Its rich musical style, complex structure, profound emotional expression, and cultural content all made it a very attractive and enjoyable piece of work.