Zircon is one of the important minerals for studying the early Earth evolution, because its U-Pb age, trace elements and isotopic compositions can place important constraints on the petrogenesis and even the geodynamic background of host rocks. This article summarizes the main research results obtained in the past 10 years from six aspects: mineral inclusions in zircon, trace elements, U-Pb isotope system, Lu-Hf isotope, O isotope and Si, Zr and Ti isotopes. The previous studies have suggested different mechanisms of generation of secondary mineral inclusion and the restrictions of primary mineral inclusions on the early crustal composition, the relationship between the increase of S-type granites and the transformation of tectonic system, the mechanism and recognition of radioactive Pb enrichment, the mechanism of craton stability reflected by the Lu-Hf isotope,and the determination of the primary O isotope and its restriction on the early Earth hydrosphere state. The above research results show that zirconology is an indispensable and important research method for studying the evolution and tectonic system of the early Earth crust.