Abstract: Aiming at the current situation that the technology and construction level of rural housing construction in China lag behind, the spatial patterns and problems of rural housing in Chongqing are summarized on the basis of investigate and survey. The relevant practice of domestic prefabricated light steel structure in rural areas is studied, the hierarchical division method of module is proposed by comparing prefabricated and traditional construction process, and the single-body design demonstration is carried out by using cold-formed thin-walled steel system, and the design method of prefabricated rural housing is explored from three levels:standardized design and diversified combination of modular functional system, establishment of standardized component library of structural system, and construction practice of important nodes of module, in order to provide ideas for the modular design and promotion of rural housing of light steel system.