Taipingchuan large porphyritic granite pluton was developed in the Erguna Massif in the northern Great Xing’an Range, NE China. The precise age of the formation and genesis of this pluton are unclear. The authors have carried out zircon U-Pb dating and Hf isotope studies by means of LA-ICP-MS. Zircon U-Pb dating results revealed that the age of Taipingchuan granite is 791.4 Ma. Combined with the previous zircon Hf isotope data obtained from Erguna Massif, the authors hold that there had been crustal accretion event in Erguna Massif in the Late Mesoproterozoic time and the 1.09~1.28 Ga Late Mesoproterozoic accretional crust had existed.