The Early Cretaceous volcanic rocks distributed in Gaoqiao Basin consists of basaltic trachyandesite, trachydacite and rhyolite, with SiO2 contents varied between 51.97%～68.94%. They are belong to alkaline series, characterized by enriched LREE, LILEs(e.g. , Rb, Ba and K), and Sr-Nd-Pb isotopic compositions, and depleted HREE and HFSE(e.g. , Nb, Ta and Ti). The potassic trachyandesites exhibit high REE, Cr, Ni contents, and Sr/Y, La/Yb, Th/U ratios, which are the common features of the enriched lithospheric mantle-derived mafic rocks(e.g. , Fangcheng basalts, Yinan gabbros)in the southeast margin of the North China Craton. This implied that the trachyandesites originated from the partial melting of the enriched lithosphere mantle. The sodic basaltic-trachyandesite has low Cr, Ni, 87Sr/86Sr(t) and high εNd(t), suggesting it is originated from enriched mantle sources with incorporation of depleted asthenosphere components. The Early Cretacous volcanic rocks in Gaoqiao Basin were formed under the lithosphere extension setting. The activities of the Yi-Shu fault zone induced and provided an advantage site for asthenosphere upwelling, resulting the melting of lithosphere mantle.