A study of Petrologic feature,geochemical characteristics,zircon U-Pb chronology,Hf isotope of the Guchengzi monzogranite and Yezhugou alkali feldspar granite in Huanren area,eastern Liaoning.The petrological and geochemical characteristics show that Guchengzi monzogranite is quasi-aluminous-weak peraluminous highly fractionated I-type granites and Yezhugou alkali feldspar granite is quasi-aluminous-weak peraluminous A-type granites.The zircon U-Pb dating results of LA-ICP-MS show that the diagenetic age of I-type granite is 125±1Ma and A-type granite is 116±1Ma,both are the products of Early Cretaceous magmatism.The geochemical characteristics of I-type granite and A-type granites are rich in Si, alkali and poor in Mg,Ca,Ti, I-type granite are more poor in P.Trace elements, both I-type granite and A-type granites have similar standardized models of mantle rocks,the I-type granite have lower contents of REE,and the fractionation degree of LREE and HREE is low, more obvious negative Eu anomalies and negative Ba,Sr,P and Ti negative.The zircon saturation temperature calculation results show that the zircon saturation temperature of I-type granites (747℃-793℃) is significantly lower than that of A-type granites (839℃～872℃).The εHf(t) values of two types of granite are all negative with relatively low values (－11.42～－22.20),indicating its crustal origin.The two types of granite have different Hf isotopic compositions,with εHf(t) values of －22.20～－16.02 for the I-type granites,and of －15.98～－11.42 for the A-type granites,suggesting that they were generated from different sources.Based on the data of petrology,geochemistry and isotopic characteristics,two type of granite was triggered by the subduction of the Pacific plate under the Eurasian plate during the late Early Cretaceous.