Shizhaishan tombs are indigenous to the Dianchi region of the Han Dynasties. In order to understand the production process of Han Dynasty copper artifacts in Kunming, Yunnan Province, we used metallographic microscopy, scanning electron microscopy-energy dispersive spectrometry to study 31 bronzes from six tomb groups:M3, M5, M6, M7, M10 and M12. The results show that 30 objects are copper-tin alloys and that one is red copper, and all of them were cast, with only the blade of a copper Ge undergoing hot forging processing. The analysis results enrich the study of copper artifacts of the Shizhaishan culture, provide a scientific basis for the conservation and restoration of artifacts, and also supplement some information for copper archaeology and metal technology history of Yunnan in the Han Dynasties.