Drama movie does not copy the structure of dramatic works, but most films have a structure similar to that of stage plays. The most common structural principles of dramatic films are two: 1? To focus the development of action around a basic central event; 2? The parallel development of two or more episodes linked by unified ideas and concepts. The emergence of dramatic films is in line with the prevailing film concept in the 1930s and 1940s. Starting in the 1940s, this traditional principle of the structure of film plays has been broken (see "fiction film"). In modern films, the structure principle of dramatic films still occupies a certain place and has its vitality, especially in the style of adventure films, detective films, mystery films, comedies and so on. What is different from the past is that people generally pay attention to the problem of film verisimilitude, and strive to achieve a better combination of verisimilitude and hypothesis, documentary and dramatic. Since the late 1970s, the theoretical circle of Chinese film has discussed the above problems for many times, which has overcome the tendency of the stage in the past film creation to a certain extent