Geochemical Characteristics of the Tangjiaping Morich granodiorite porphyry is discussed in this paper. And the forming tectonic setting as well as the genetic mechanism of the porphyry is discriminated with diagrams. It is concluded that the chemical compositions of the Tangjiaping granite porphyry are of characteristics of superacid (SiO272.94%~77.9%), alkalirich (K2O + Na2O 7.06%~9.66%), Krich and Nadepleted (K2O/ Na2O 1.21~2.12) , with LREEenriched, HREEdepleted, and (La/Yb)Nin between 18.12 and 23.52, a relatively flat HREE distribution patterns, coefficient of Eu anomaly (δEu) 0.46~0.59, and a mediumnegative Eu anomaly. So, the porphyry belongs to superacid,aluminumunsaturated,highK, calcalkaline series of magmatic rocks. The Tangjiaping granodiorite porphyry was formed after the major collisional period of the North China block and Yangtze block, that is, the postcollisional tectonic setting under the regional extension mechanism. The study of amphibolite andesite enclave shows that the formation of graniteporphyry is closely correlated with delamination of the thickening lower crust, and the delamination effect led to partial melting of rocks at different depths in the lower crust simultaneously, postemplaced hornblende andesite mixed with the early granitic magma in channel. The decompression melting fluid system of asthenosphere provides the driving force for magma emplacement and metallogenic material.