Through the study of granodiorite porphyry in Lalinggaoli River, East Kunlun, it provides an important basis for the subduction collision orogenic process of the Paleotethys Ocean, and also provides further basic data support for the next prospecting work in this area.Methods:Detailed petrogeochemistry, LA- ICP- MS zircon U- Pb geochronology and zircon Hf isotope studies of granodiorite porphyry in Gounao area of Lalinggaoli River,are carried out to determine its formation age, and discuss the petrogenesis and diagenetic tectonic setting. Results:The zircon U- Pb age of granodiorite porphyry is (231.1±1.2) Ma, which indicated that the emplacement occurred in the early Late Triassic. The K2O/Na2O values of the whole- rock were 0.69~0.71, Mg# values were 45.3~46.02, σ values were 1.90~2.09, and A/CNK 1.01~1.03, which belong to weak peraluminous medium—high potassium calc- alkaline rock series. The samples have obvious differentiation of light and heavy REE elements (La/Yb)N values of 19.54~25.52, slight negative Eu anomaly (δEu 0.96~0.97), enriched in large ion lithophile elements K, Rb, Ba, Th, and depleted high field strength elements Nb, Ta, Ti. The samples have high Sr content (606.0×10-6～647.9×10-6) and Sr/Y value (60.38~62.99), low Y (9.62×10-6～10.66×10-6) and Yb (0.8610-6～0.92×10-6), showing an adakitic geochemical characteristics. Zircon Hf isotope εHf(t) values ranged from -6.93 to -2.94, corresponding to the distribution range of crustal model age (TDM2) from 1.45 to 1.70 Ga .Conclusions:Comprehensive analyses show that granodiorite porphyry was formed in the transition setting from the subduction of Eastern Kunlun oceanic crust to local collision, and was sourced in the partial melting of thickened lower crust under high pressure.