Based on the national baseline survey data of China Health and Retirement Longitudinal Study(CHARLS), this article evaluates the influence of clan structure on public goods supply in rural areas and its effect path from the dimensions of quantity and concentration. The results show that: in the aspect of quantity, compared with non- clan, well- balanced clan structure significantly improves the supply of public goods in rural areas whereas the influence of a single clan monopoly and multiple-clan hybrid is insignificant. Meanwhile, in terms of the centralization level, compared with non- clan, the clan structure of high oligopoly has a significant positive impact on the supply of rural public goods while the competitive and low oligopoly structure fails to play a significant role. Moreover, it is found that the number of clan groups affects the supply of rural public goods through the elected candidates' willingness. The degree of clan concentration influences the supply of rural public goods through the elected candidates' ability.