LA-ICP-MS U-Pb zircon ages and geochemical data of whole rocks are reported for meta-rhyolites from the Kangbutiebao Formation in the Maizi Basin at the southern margin of Altay orogenic belt. The zircon U-Pb isotopic data constrain their magmatic emplacement at (410.5±1.3) Ma and (400.4±2.1) Ma, respectively. The results presented in this study indicate that meta-rhyolites are characterized by high concentrations in SiO2(72.15% to 81.26%), total alkali (Na2O+K2O)(7.23% to 11.55%), and low concentrations in Al2O3(10.56% to 14.87%), TiO2(0.16% to 0.27%), MgO(0.04% to 0.14%), CaO(0.04% to 2.42%) and TFe2O3(0.11% to 1.64%).