Abstract:As the main place for tourists?? activities, liner??s public space will directly affect the overall experience of tourists. How to effectively improve the structure of liner??s public space to meet the physical and mental needs of tourists is an urgent problem. In terms of research ideas, this paper will try to explore a research model for internal public space. With the help of space syntax software, this paper makes a comparative analysis of the atrium space of the representative liners including Carnival Vistas, Costa Venezia and Leading Ship. According to the spatial connectivity and visual field integration, this paper evaluates the characteristics and shortcomings of atrium spatial structures, and puts forward corresponding improvement suggestions. The research purpose is to instruct the quality improvement of liner??s public space in the future.