In movies, many special scenes or psychological states of characters can't be expressed by lines, and appropriate music can play a good guiding and suggestive role. The appearance of an ordinary character in the film is often entertained by his every move, so that the audience can clearly distinguish whether he is a good person or a bad person. Of course, with the development of movies, such simple handling methods will become less and less, but they will not change. Music, as a special language, can play a role in revealing scenes and metaphors of characters' psychology in movies. In many series of movies, a certain paragraph or a certain kind of music always represents a relatively fixed meaning. In other words, this piece of music or music belongs to a special person or scene. For example, Altman, Zorro, Spider-Man and Superman all have their own representative music. Whenever the music is played, the audience will know that a role is about to appear, thus playing a foreshadowing role.
Background music can render the atmosphere and guide and control the psychological state of the audience. In the process of rendering the atmosphere and affecting the audience's mood, it also gradually promotes the expression of the movie theme, which makes the audience interact with the movie, thus making the movie theme stand out in the audience's mind. A good movie leaves a deep impression on the audience, not only the story and the picture production, but also the background music, as one of the important artistic elements of film and television works, plays an important role in promoting the film effect in macro, micro, all-round, serialized, deep and high-level equality.