Flantz Schubert's eighth symphony "Unfinished" shows the composer's exquisite skills and amazing talent. The work was written in 1822 when Schubert was 25 years old, but it was not until 43 years later that the score was discovered and premiered in 1865. In this symphony, only the first and second movements have a complete score, the third movement has only 9 bars adapted for orchestral music, the other parts remain in the form of piano score, and the fourth movement has no draft. However, the first and second movements can be perfectly matched in form and emotional treatment, and the whole content has been completely expressed so far. Adding any scherzo movement or final movement, there is a feeling of gilding the lily. Therefore, although this song is not finished in form, it is actually intact, and therefore it appears novel in structure, which is probably unexpected by the author. This song is not only the most outstanding work in Schubert's symphony, but also a peerless masterpiece of romantic music. It expresses the contradictions and conflicts in the author's inner world, and the sadness is full of the whole music. Transparent, pure, beautiful and rich melody, unadorned harmony and timbre, this composition technique is very fresh, which is an important reason why this piece has become one of the most popular symphonies in the world.