As an important part of the strategy of comprehensively promoting rural revitalization, it is crucial to give full play to the organizational aggregation role of village cadres and effectively guide the participation of new social capitals formed mainly by new agricultural management subjects. Based on the questionnaire survey data from 19 provinces, the mechanism of village cadres in promoting the willingness of new social capitals to participate in rural construction actions was analyzed by using a binary Logit model. The results show that village cadres can significantly promote the willingness of new social capital to participate in rural construction through the role of organizational aggregation in shaping their own credibility and collective consensus formation. In terms of effect, the role of village cadres has a significant positive impact on the willingness of new social capital to participate in projects that are closely related to their personal interests, as well as on the willingness of new social capital subjects in less-developed areas.