Crustal anatexis is a significant geological process that plays a crucial role in the differentiation of continental crust and the migration of elements. The Beishan Group, located in the southern edge of the Central Asian Orogenic Belt (CAOB), underwent amphibolite facies metamorphism and anatexis. The relationship between the Paleoproterozoic amphibolite of the Beishan Group and the related felsic veins suggests that the metamorphic strata of the Beishan Group experienced partial melting, and the melt was segregated and accumulated in situ. Zircon U- Pb chronology indicates that anatexis occurred in the Late Devonian, with the n(206Pb)/n(238U) weighted average ages of zircons from felsic veins being approximately 370 Ma. The age of n(207Pb)/n(206Pb) at one spot is 1623±12 Ma, which is highly consistent with the previous dating results of the Beishan Group reported by others. Although this age is not sufficient to prove it, combined with the other evidence, it may indicate that the source of the felsic veins is the Beishan Group. Furthermore, anatexis is widely developed in the Beishan Rock Group, with a large number of garnet, tourmaline, and mica minerals visible in the outcrop, indicating a high potential for rare- metal mineralization.