The Zongwulong tectonic belt is located between the northern Qaidam tectonic belt and the South Qilian tectonic belt, which is generally distributed in a NWW direction. The voluminous magmatic activity in the eastern part of the tectonic belt records the process of breakup and closure of the tectonic belt during the late Paleozoic Mesozoic, while the magmatic activity in the western part is relatively rare, so it is unclear whether the eastern and western parts of the belt have the same tectonic evolution. Based on the analysis of geochemical characteristics, detrital zircon U-Pb ages and Hf isotopic compositions of the clastic rocks of the Triassic Longwuhe Formation in the western part of the tectonic belt, it is considered that the provenance of the detrital sediments in the Longwuhe Formation was slightly weathered without sedimentary recycling characteristics, and their original rocks are mainly felsic rocks. The main provenance of clastic rocks in the Longwuhe Formation is the southern Qilian Neoproterozoic granitic gneiss and early Paleozoic continental arc granite rocks, and the clastic rocks may have been deposited in Early-Middle Triassic flexural basins. Zircon U-Pb age analysis shows that the tectonic evolution of the eastern and western segments of Zongwulong tectonic belt has different processes. Limited ocean basins developed in the eastern segment but not in the western segment, the transition zone may be located between Shengge and Luogenguole area.