Abstract: The upper limit line of the deposition of the Diaoyutai Formation is given by distributional pattern of detrital zircon age from the Diaoyutai Formation, Xihe Group, Qingbaikou System. The main volume of the distributional pattern of detrital zircon age is 1.6 Ga and the youngest age is 1075 Ma, which reflects the depositional age is younger than 1.0 Ga. According to the distributional pattern of detrital zircon age from the Diaoyutai Formation, Xihe Group, it shows that the Diaoyutai Formation has different rock sources with North China Block, and they have different ages. The paper confirms the Late Precambrian Geological Time Scale by some new zircon SHRIMP U-Pb dating results, e.g. Changcheng System(Ch, Pt21)limit is in 1.8-1.6 Ga; Jixian System (Jx, Pt22) limit is in 1.6-1.4 Ga；unnamed system(Pt23-4)limit is in 1.4-1.0 Ga; Qingbaikou System(Qb, Pt31)limit is in 1000~780 Ma; Nanhua System(Nh, Pt32)limit is in 780-635 Ma and Sinian (Z, Pt33) limit is in 635-542 Ma.