住房保障制度通过再分配机制向中低收入家庭提供住房福利，是中国高效实现民生、发展、稳定协调互促的基础保障制度。那么，住房保障制度作为发挥社会再分配功能的福利性支出，是否促进了居民家庭实现共同富裕呢？针对这一问题，运用中国家庭金融调查（CHFS）数据进行实证研究发现：中国住房保障制度因其再分配功能缩小了社会各阶层家庭资产差距，对居民家庭实现共同富裕具有促进作用，但这一影响在人口规模大的家庭以及高物价和高房价地区等居住成本较大的家庭中有所减弱。进一步而言，从结构特征看，住房保障制度对物质富裕和精神丰实具有正向影响，而对社会共享没有明显影响，其原因在于地方财政住房保障水平的差异。这些结论对于今后如何调整中国住房保障制度，以进一步发挥其对家庭共同富裕的正向作用，具有较强的政策意义。

The housing security system provides housing benefits to low-income families through redistribution mechanism, which is the basic security system for China to efficiently realize people’s livelihood, development, stability, coordination and mutual promotion. Does the housing security system, as a welfare expenditure that plays the role of social redistribution, promote the common prosperity of households? Based on the data of China Household Finance Survey (CHFS), this paper makes an empirical study and finds that China’s housing security system has narrowed the asset gap among households of all social strata due to its redistribution function, and has promoted households to achieve common prosperity, but this impact has been weakened in large families with large population size and families with high living costs in areas with high prices and housing prices. Furthermore, from the perspective of structural characteristics, the housing security system has a positive effect on material wealth and spiritual wealth, but has no significant impact on social sharing, which is due to the differences in the financial expenditure level of local governments on housing security. These conclusions have a strong policy significance for how to adjust China’s housing security system in the future in order to further play its positive role in common prosperity.