Against the backdrop of global energy structure transformation and sustainable development, the study of energy utilization patterns in rural areas of China, as an important area of energy consumption, is particularly important. However, the complexity and diversity of rural energy systems, as well as their close connection to agricultural production and residential life, pose a series of challenges to the aggregation of decentralized resources in the power grid. This paper aims to deeply analyze the multi energy complementary mechanism of the aggregation of rural decentralized resources by the power grid, and explore its applications in decentralized residential life, centralized residential life, agricultural production, and other aspects; Propose a multi subject incremental value contribution indicator system for the aggregation of various decentralized resources in the power grid, construct an evaluation model for the carbon reduction effect of rural energy aggregation in the power grid, and conduct a comprehensive analysis of the carbon reduction value and contribution of decentralized resources in rural power grid aggregation. Finally, the feasibility and accuracy of the model were verified through case analysis based on typical agricultural production scenarios, providing new solutions for rural low-carbon transformation and theoretical support for supporting the construction of modern energy systems in rural areas and achieving the strategic goals of rural revitalization.