This dataset contains the trapped air isotopic and elemental ratio compositions of the Chongce ice core. The ice core was drilled in 2013 on the Northwestern Tibetan Plateau (35°14' N, 81°7' E). This dataset includes: (1) the raw data of sample depth, total air content, δ18O, δ15N, δO2/N2 and δAr/N2 compositions; (2) post-depositional corrected δ18Oatm data; (3) CO2 concentrations; (4) dating result based on δ18Oatm synchronization with the Antarctic Siple Dome ice core.