Developing new rural collective economies， as a key to comprehensive rural revitalization， requires not only the establishment of clear property rights， sound governance structures， stable business operations， and fair profit distribution mechanisms， but also the exploration of innovative pathways for achieving high-quality growth. Based on the New Endogenous Development Theory， this study constructs a theoretical framework where external production factors can be embedded into villages via three pathways： resources， rules， and organizations， effectively unlocking the development potential of internal production factors. Through investigations of four typical case villages in Jiangsu province， this paper analyzes four development models： introducing external human capital for integrated agricultural-tourism development， leveraging start-up capital to establish cooperative farms， partnering with external agricultural enterprises for joint village-enterprise development， and achieving collective development through resource integration. The research findings indicate that resource embedding provides villages with rare resources and optimizes the allocation of internal and external resources， rule embedding offers a basic foundational framework for the entry and integration of external resources， and organizational embedding reduces transaction costs and enhances the productive efficiency of both internal and external resources. The underlying logic of the new endogenous development of the new-type rural collective economy can be summarized as the effective complementarity of resources，governance mechanisms that align with organizational structures， and incentive compatibility among diverse stakeholders.