Three episodes of intrusive magmatic activities occurred at the Hupiyu area of Yingkou in Liaoning province during the Paleoproterozoic. The early Hupiyu Liaoji granite emplacing in 2123±17 Ma is characterized by rich Si and alkali, low Ca, and negative Eu anomaly, suggesting its geochemical features similar to that of Atype granite. Extremely low Sr and high Yb indicate that the granite formed in a lowpressure crust thinning setting. The secondepisode Housongshugou granodiorite forming in 1892±16 Ma is high in SiO2, Na2O, Al2O3, with the value of Na2O/K2O greater than 1.3, no or positive Eu anomaly, indicating that it is similar to adakitic rocks. Lowhigh Sr and low Yb suggest that the granidiorite formed in a high pressure setting with great depth, probably related to the partial melting of underplating basaltic magma in the postcollisional thickening crust setting. The Nantaizi quartz monzonite at the late stage formed in 1851±11 Ma, and has high alkali (Na2O＋K2O=11.32%~11.93%) and Rittmann index of 662~705, indicating that the magma was the product of the intracontinental extension after the orogeny. Low Sr and Yb also indicate the middle pressure and a depth of 40~50 km. Three magmatic events mentioned above have a significant indication for tectonic evolution of Liaoji Paleoproterozoic active belt: the early Liaoji granite possibly formed in the back arc extentional setting of Liaoji Paleoproterozoic active belt; the Housongshugou granodiorites were the product of thickened crust after later Paleoproterozoic collision; and the Nantaizi quartz monzonite belongs to the postorogenic granite which marks completion of cratonization in the Liaodong area and beginning of the postorogenic extension evolution.