This paper takes the soundscape design of domestic suspense films as the research object, aiming to explore the classification, case analysis, and production process of soundscapes in domestic suspense films, and to propose innovative strategies. Firstly, by defining and classifying film soundscapes, the characteristics of soundscape design in domestic suspense films are summarized. Secondly, through a specific case study of Lost in the Stars, the application and effect of soundscape design in domestic suspense films are analyzed. Next, the production process of soundscapes in domestic suspense films in the digital cinema era is introduced, including sound design, simultaneous recording, post-production, mixing, and playback stages. Finally, innovative strategies for the soundscape design of domestic suspense films are proposed. This research aims to provide theoretical support and innovative ideas for the practice of soundscape design in domestic suspense films.