Abstract:Tianliaoling copper smelting site located at Xishan Village, Rongxi Town of Rongxian County, in Guangxi, covering an approximate area of 0.12 km2 is proven to belong to the Han and Tang Dynasties through archaeological research. The composition of 18 slag samples from the site was analyzed by SEM and SEM-EDS. Additionally, the melting point of two slag samples was determined through deformation testing. The results indicate that Cu-Pb coexisting ore is extracted from the site and pure copper is produced through an “oxidized ore - copper” smelting process. The high smelting temperature and effective separation between copper and furnace residue indicate a relatively advanced level of smelting technology at this site.