Objectives: The metasandstones in Boyang—Yuanlong area located between Tianshui—Wushan suture zone and Xinyang—Yuanlong ductile shear zone. Up to now, the study of the metasandstone in Boyang—Yuanlong area is not mature. Research of metasandstone in Boyang—Yuanlong area could offer important information for the study of Qinling orogenic belt. Methods:Based on the clastic zircon LA-ICP-MS U-Pb dating and the analysis of geochemical data, we discussed the age and structural environment of the metasandstone in Boyang—Yuanlong area. We Combined the zircon LA-ICP-MS U-Pb dating with geochemical data analysis and offer proof of the evolution of Tianshui—Wushan suture zone.Results:①The metasandstone was formed in Middle Devonian, and the clastic sediment comes mainly from the Northern Qinling orogenic belt and Yangtze craton；②The provenance of metasandstone was in Boyang—Yuanlong area is active continental margin in setting；③The closure of Tianshui—Wushan suture zone had been completed before Middle Devonian but not entirely.