5 samples from the phosphoric rock series and related stratigraphy in the northern Jiangsu province were analyzed by zircon U- Pb isotope datingto obtain the sedimentary age of the Haizhou- type phosphorite. The dating test result shows that the 206Pb/238U age range of magmatic zircons from a muscovite two- feldspar gneiss sample of the Yuntai Formation from the Liuzhizhou mountain in Jinping Town is 846~761 Ma and the average age is 790. 5±5. 1 Ma. The 206Pb/238U age range of the clastic zircons from an epidote muscovite schist sample of the Jinping Formation from the Jinping phosphorite mining area is 835~761 Ma, indicating that the sediment sources are mainly Neoproterozoic magmatic rocks, and this sample formed later than the youngest detrital zircon age 761±16 Ma. The ages of the clastic zircons from a biotite plagioclase gneiss sample inthe Liuji phosphorite survey area were concentrated at ～2. 5 Ga,～1. 9 Ga and ～804 Ma, indicating that this sample formed later than the youngest detrital zircon age 777±11 Ma. The 206Pb/238U age range of magmatic zircons in a gneissic granite sample from the Qushan mountain in Jinping town is 820~778 Ma and the average age is 803. 3±3. 8 Ma. The age range of metamorphic magmatic zircons from a gneissic granite sample in the Taihe phosphorite survey area is 832～794 Ma and the average age is 805. 6±6. 2 Ma. The zircon chronology result demonstrates that the formation time of Yuntai Formation and Qu Shan, Taihe gneissic granite is all Neoproterozoic.