It is discovered that zircons (2400 Ma1士)from charnockite and granulite in Lower Jining Group of Inner Mongolia and Sanggan Group of Hebei exhibit euhedral growth zoning and compositional zonation of increasing HfO2 content and decreasing ZrO2/HfO2 ratio from the core to the edge of a crystal, suggesting that these zircons grew during magrnatic crystallization and differentiation. Nevertheless,the edges of these zircons are rounded, and their compositional zonation shows resemblance to that of recrystallized zircons in metamorphism,implying that these zircons have experienced metamorphism, with recrystallization growth along their edges. As for the charnockite studied in this paper, the authors consider that its formation underwent a cycle of protolith metamorphism metamorphic rock anatexts magma (TTG type) crystallization and differentiation TTG type granite or charnockite, (unaer high pressure) metamorphism existing charnockite ) which seems to be one of the materials exchange modes between the crust and the mantle and leads to the formation of the stratified structure of the earth. Zircons of 1980 Ma士 found in granulite of Upper Jining Group exhibit rounded growth zoning and compositional variation trend opposite to that of magmatogenic zircons,tending to decrease in HfO2 and increase in ZrO2/HfOz from the core to the edge of the crystal,which suggests that these zircons are of metamorphic recrystallization origin.