The purpose of this study is to clarify the mechanism of Government Embedment and Organizational Environment on the supervisory effectiveness in collective governance of Rural Residential Land, and to provide decision-making reference for optimizing the order of Rural Residential Land utilization and promoting the effective implementation of collective governance of Rural Residential Land. The research employs various models including OLS model, Tobit model, mediated effect model and moderated mediated effect model. The research results show that 1) Government Embedment can significantly enhance the supervisory effectiveness in collective governance of Rural Residential Land. 2) The Technical and Cultural Environments in the Organizational Environment can significantly enhance the supervisory effectiveness in collective governance of Rural Residential Land, but the Resource Environment has a negative effect on the supervisory effectiveness in collective governance of Rural Residential Land, the Technical Environment and the Cultural Environment play a partially mediating effect, and Resource Environment plays a masking effect. 3) Anonymous whistleblowing mechanism positively moderates the positive effect of Technical Environment and Cultural Environment on the supervisory effectiveness in collective governance of Rural Residential Land. 4) There is locational heterogeneity in the influence of Government Embedment and Organizational Environment on the supervisory effectiveness in collective governance of Rural Residential Land. In conclusion, our research underscores the need to build a supervision and sanction mechanism for coordination between towns and villages, promote the integration and complementarity of formal and informal systems, establish and improve an anonymous whistle-blowing mechanism for the use of illegal Rural Residential Land. These strategies will enhance the supervisory effectiveness of Collective Governance, so as to promote the effective implementation of collective governance of Rural Residential Land, and break the dilemma of Rural Residential Land governance.