As a Paleoproterozoic orogenic in the North China Craton, the Jiao-Liao-Ji Belt preserves rich records of metamorphism magmatism, sedimentation and metallogeny. The p-T-t paths of the widespread high pressure granulites within this belt reveal the subduction-collision-exhumation geodynamic process. However, the timing of continental collision and subsequent extension is still controversial. In this paper, the petrography, zircon U-Pb geochronology, major trace elements and Lu-Hf isotopes of the whole rocks of the Paleoproterozoic granites in Daloufang Dandong area are systematically analyzed. The results show that the weighted average age of the magmatic zircons is 1 873~1 869 Ma, and the emplacement time of the acquired granites is Paleoproterozoic. The Daloufang Pluton mainly consists of gneissic biotite monzogranite, with characteristics of high SiO₂(72.39%~74.20%), medium Al₂O₃(14.66%~15.40%), medium CaO(1.35%~1.84%) and low MgO(0.07%~0.35%). The REE distribution curve is right-leaning with strong Eu positive anomaly. Trace elements are enriched in large ion lithophile elements such as Rb, Th, U, K, and depleted in high field strength elements such as P, Ti, etc. It is characterized by high potassium calc-alkaline series of quasi-aluminum to weak peraluminous, and has similar petrogeochemical characteristics to I-type granites. The εHf(t) values range from -1.76 to +1.45, and the two-stage model ages range from 2 607 to 2 425 Ma, indicating that the magmatic source area is not only from crustal material recycling, but also from neoarchean to Paleoproterozoic material added to the crust or the formation ofnew crust. The geochemical characteristics of late Paleoproterozoic gneisses monzogranite in Dandong area are similar to those of active continental margin arc granites related to subduction, and similar to the metamorphic age of argillaceous granulites in Ji’an area in the north. It is suggested that the Jiao-Liao-Ji Belt may have been experienced collision in the late Paleoproterozoic, which provides important constraints for the exploration of the orogeny of the Jiao-Liao-Ji Belt and the process and time limit of the post-collision extension.