Horror after Elevated: A Study of the Film Style of Ari Aster

American director Ari Aster is a representative director of the emerging horror genre of elevated horror, and his three feature films have revolutionized the language of the horror genre and gained great reputation in the industry and among fans. Through analyzing the three feature films and eight short films directed by him, from the two levels of aesthetic style and thematic expression respectively. It explains the spatial narration, mise-en-scène, the use of lens, and the use of sound present in the works of Ari Aster, and points out the thematic ideas of Ari Aster's works about pathological family relationships and the psychological dilemmas of the characters.