Tongkengzhang molybdenum deposit is located in East Nanling area. We have gotten lots of important progresses after primarily exploring. It has molybdenite-fluorite combination, special interior structure, big grain, and high grade. These characters are different from those low-grade molybdenum deposits, including porphyry and quartz-vein types. Through Re-Os dating, we know the mineralogenetic epoch(134Ma) that is significant to know how this deposit formed and how the large-scale mineralogenesis evolved at Yanshanian in South Jiangxi province.