Excavation of Tomb M12 at Zhaoxiang, Dangyang, Hubei Province, yielded 459 pieces of ornaments, some of which were covered with gold or tin foil carved with decorative patterns. The decorations were elaborate and fine, featuring smooth lines and the artistic style of Chu. Since excavation, those ornaments have not been subjected to any conservation or restoration, so the fine patterned gold foils were scattered, curled and dirty, and covered with dust and corrosion products. As a result, the function of those metal ornaments was not clear. In our study, we took Bi-shaped gold-wrapped bronze ornaments excavated from the tomb as objects of research. First, we analyzed the bronze body, gold foil and corrosion products of the objects by microscopic analysis, X-ray fluorescence spectrometry (XRF), X-ray diffraction (XRD), scanning electron microscopy-energy dispersive X-ray spectrometry (SEM-EDX) and ion chromatography (IC). Then we cleaned off the corrosion products and matched and posted the gold foil. In addition, we rearranged excavation situations of metal ornaments with the same shape as our samples of the pre-Qin period in China, and made a preliminary research on its use scenes.