Abstract: The Devonian strata are widely distributed in the southern Qinling area, and provide significant information for revealing geological evolution of the southern Qinling belt. It is still disputing for material sources and tectonic setting of the Devonian sediments in the Southern Qinling belt, and relevant discussion of crustal growth is absent. Based on zircon U-Pb geochronology of the sandstone from the Devonian sediments in the Foping area, southern Qinling belt, it is show that the detrital zircon grains were dominantly formed at 500～400 Ma and 1 300～700 Ma. In addition, a few older zircon populations with U-Pb ages of ～1.85 Ga, ～2.5 Ga and ～2.7 Ga were also discovered. Detrital zircon U-Pb ages integrated with Hf isotope analysis show that the clastic materials were mainly derived from the southern Qinling belt, the northern Qinling belt and the southern northern China block, but lack of detritus from the northern margin of the Yangtze block. Combined with the previous published Hf isotopic data of the Liuling Group, the Devonian detrital zircons in the southern Qinling belt have recorded three significant crustal growth events in their sedimentary sources, which are corresponding to the Early Paleozoic magmatic event（500～407 Ma）in the northern Qinling belt, the Neoarchaean-Paleoproterozoic（～2.5 Ga）and Neoarchaean（～2.7 Ga）magmatic events in the southern northern China block, respectively. Based on the previous studies and the distribution characteristics of cumulative curves, we consider that the Liuling Group was in a foreland basin environment during this time.