The key technologies for low-carbon and high-yield of double-cropping rice in South China (DCRSC) and their integrated application were introduced from the aspects of low-carbon variety selection, water-saving and emission reduction irrigation, and fertilizer reduction and efficiency enhancement, etc. The main progress, problem and future focus on the development and extension of low-carbon and high-yield technology for DCRSC were summarized. The low-carbon and high-yield cultivation technology for DCRSC could synergize water-saving and fertilizer-saving, emission reduction and pollution control, high yield and income, realized the coordination of low-carbon and high-yield, therefore it would have a good application prospect. There are main problems for this technology including limited available varieties, undiversified planting modes, and difficult promotion at present. While increasing policy support, further efforts are needed to enhance the improvement and extension of the new technology, including variety screening, cropping pattern optimization and basic research, so as to ensure national food security and achieve carbon peak and carbon neutrality goals.