Since the folk houses are an important carrier of regional culture, the work aims to study the style of folk houses to understand the representation changes of regional folk houses in different periods and their cultural connotations. The "Vosviewer" is used to visualize and analyze the research on the theme of "folk houses" and the importance of traditional folk houses and the weakness of the research on folk houses in Hainan are identified by comparing the data. Then, the specific analysis is carried out. With Hainan as an example, its traditional folk house style is sorted out in terms of form, structure, material, and zoning, etc. In the order of the time line, the style characteristics, reasons for the formation and development changes of the different folk houses of Li people, Dan people and Han people in Hainan from the Song Dynasty to the Qing Dynasty are summarized. Suggestions are provided for the protection of Hainan's regional folk houses combined with the current background, so as to provide ideas for the inheritance of Hainan's regional folk houses. It is clear that the style of folk houses is not a fixed pattern, but a continuous process of constant change.