The Jiaolai Basin is an important Au—Cu polymetallic metallogenic belt in eastern Shandong Province. The Qibaoshan subvolcanic complex in Wulian is a complex rock mass developed in the southern margin of Jiaolai Basin, which is most closely related to the metallogenesis of Au—Cu polymetals. With the development of prospecting work in the outer and deep parts of the complex, the granite porphyry has been discovered in the deep part of the complex. On the basis of lithographic observation and zircon U- Pb dating of granite porphyry, this paper attempts to clarify the genetic type, provenance characteristics and tectonic environment of this rock mass through whole rock geochemistry and zircon Hf isotope analysis. Zircon U- Pb dating results show that the granite porphyry was formed in 120.0±0.3Ma and 120.5±0.3Ma, which is early Cretaceous. The granite porphyry as a whole is characterized by high Si, Al, Na, and low Fe, Mg. It is a weak peraluminous rock with high potassium calcium alkalinity, relatively enriched in light rare earth elements and large ion lithophile elements, and deficient in heavy rare earth elements and high field strength elements, with obvious Ta, Nb, Sr and Eu negative anomalies, belonging to type I granite.The Hf isotopic composition of the zircon is obviously negative, and the mean age of the two- stage model is 2891Ma, indicating that the magma originates from the Mesoarchaean ancient shell source material. Tectonic environment discrimination shows that the granite porphyry was formed in the post- orogenic tectonic environment after the plate subduction briefly extended, belongs to post- collision granite, and is basically consistent with the subduction of the Pacific plate to Eurasia and the magmatism related to mineralization in the region.