Abstract: The biotite quartz schist from the Maoping felsic schist unit in Wuguan Group of Shangnan-Danfeng tectonic belt has been selected as research object in this paper, which has been studied by usingLA-ICP-MS zircon U-Pb isotope chronology to discuss the sedimentary age and material source of this schist. The results show that the detrital zircon ages can be divided into 4 age spectrums:Early Paleozoic-Early Simian age spectrum ranges from 416.8Ma to 590.5Ma, with a peak of 449Ma; Neoproterozoic age spectrum varies from 731.5Ma to 1055.8Ma, peaking in 830Ma; Mesoproterozoic-Early Proterozoic age spectrum changes from 1 606.9Ma to 1 816.9Ma, with a peak of 1 804Ma; Proterozoic-Archen age spectrum are 2 434.6~2 690.3Ma, peaking in 2 687Ma.The comprehensive study suggests that, the formation time of Maoping felsic schist unit from Wuguan Group is notolder than 420Ma, which was formed in the closure stage of formed in Shangdan ocean in Silurian and served as tectonic melange and new sedimentary formation involved in the original rifted volcanic-sedimentary rocks, while the detritus source would be provided from both north and south Qinling structural belts.