Abstract: Maoniuping deposit in Sichuan Province stands as the world's third-largest rare earth deposit, following Baiyunebo and Mountain Pass, which has great potential in finding alternative resources and ensuring Chinese rare resource advantage. Recently, second-phase exploration breakthrough has been achieved in the southern and northern peripheries of Maoniuping deposit. A concealed thick and rich rare earth-molybdenum orebody was discovered in the northern periphery around Huandangou, through comprehensive survey and evaluation work in the peripheries of Maoniuping deposit, and verified by drilling and the average total rare earth oxide content in borehole ZK4501 reaches 2%. Fifty layers of rare earth orebodies have been explored in the southern periphery, including bastnasite-(Ce)-aegirine-fluorite-barite vein type, bastnasite-(Ce)-fluorite-barite-calcite vein type, bastnasite-(Ce)-aegirine-barite vein type, and bastnasite-(Ce)-fluorite-calcite vein type. The discovery of these new orebodies with high grade and easy mining is another significant breakthrough in rare earth mineral exploration since the implementation of the new round of strategic action for breakthrough in praspecting which is of great significance for enhancing the resource security capabilities of China's second-largest rare earth resource base.