Abstract: The Hougou, Shuilutang and Dianfang K-feldspar granite porphyry bodies, outcropping within Dianfang gold deposit, Waifangshan region, south margin of the North China Craton, is spatially related to the Cryptoexplosivebreccia pipe and the gold mineralization. In order to confirm the intrusive age, lithogenesis and magma source characteristics of the K-feldspar granite porphyriey, this study adopt zircon U-Pb dating, Hf isotopic and petrogeochemical analysis. These granites are shoshonite series I type granites with high SiO2, K2O, Al2O3 and low MgO contents, and are characterized by enrichments in Rb, K, Ba and LREE but depletions in Nb, Ta, Sr, P, Ti and HREE, as well as weakly negative Eu anomalies. Zircon grains of the K-feldspar granite porphyriey are characterized by core-rim structure. Zircon rim SHRIMP U-Pb dating yields weighted mean 206Pb/238U age of 142.6±2.1Ma, with εHf(t) values of -23.0~-13.8 and tDM2 ages of 2652~2075 Ma; Zircon core LA-ICPMS U-Pb dating show that the 207Pb/235U ages are clustered in 2169~2336Ma and 1732~1881Ma, with εHf(t) values of -13.1~-4.8 and -4.5~3.7 respectively and corresponding tDM1 ages of 2376~2805Ma, indicating that the emplacement ages for K-feldspar granite porphyriey are at 142.6±2.1Ma of the early Cretaceous. Its magma source is probably derived from partial melting of the ancient continental crust of 2169~2336Ma of the Neoarchean Taihua Group, with mantle component contributed to its formation, and the zircon grains of 1732~1881Ma of Xionger Group volcanic captured by the ascending magma during the diagenetic process. In combination with the regional geological features and geodynamic settings, the K-feldspar granite porphyriey are the product of magmatic activity caused by North China Craton lithospheric thinning due to the subduction of the Pacific plate toward the Eurasian continent.