Film music is the music that reflects the artistic conception of the film in the film, and it is an organic part of the comprehensive art of the film. It plays a special role in highlighting the lyric, dramatic and atmosphere of the film. In the plot, music plays its unique role. Music, with its unique melody and rhythm, adds infinite details and charm to every plot of the film, makes people live in its own situation, and plays a narrative function in the development of the plot. Each film has its own unique music, either majestic or elegant. The visual effects of music and film are displayed on the screen together. On the one hand, it promotes the development of the plot, on the other hand, it enhances the expression of the plot. The blend of plot and music depicts the inner world of the characters and creates a perfect artistic image.