Research on the National Ideology Guiding in the Reform of Chinese Film System Chen Nan The purpose of this paper is to discuss the changes in the interpretation of the Apparels' Idéologiques d'Etat by the Chinese leaders before and after the reform and opening up. What is the impact of changes in national ideology on the reform path of the film industry? How did the state lead the development of the film industry in China's film system reform? The film has always been an important part of the Apparels’ Idéologiques d′Etat, plays an important role in advocating the mainstream ideology of the country and advocating the national image and the mainstream values in China. During the first generation of Chinese leaders, ‘art and politics’ is highly unified, artistic works should express class consciousness. At that time, the film studios subordinated to national cultural management department, film creation should follow the country's indicators and tasks. After reform and opening up, the state put forward the slogan of “highlight the main theme, adhere to the diversity”, the film system reform was put on the agenda. Especially in the 1990s, China began to import foreign “blockbusters”, so that the domestic film market and the international film market converged. In recent years, the domestic film began to increase with foreign and Hong Kong co-production, “Co-film” not only become the main box office in China, part of the film with the Chinese elements also entered the global market, to promote the image of China. In the new century, the fifth generation of Chinese leaders put forward the slogan of “social and economic benefits of unity”, emphasizing the international nature, ideological nature and literary and ornamental in artistic works. Commercial narrative model began to merge into the “main melody” frame. The mainstream of large commercial production which spread of China's mainstream values, praise the social positive energy began to appear.