The dragon shaped horsehead bronze Jian unearthed from Zhangzhuang Qiao Tomb Group King Zhao M1,which was a national first-class bronze cultural relic cast in the early Warring States period and buried in the Eastern Han Dynasty.Based on the methods such as polarizing microscope,Raman spectroscopy,X-ray diffraction,scanning electron microscopy energy spectrum,etc.,the green,blue,and gray white corrosion on its surface were respec- tively determined to be malachite,azurite,and quartz.After cleaned,derusted,repaired, and sealed treatment,the state of bronze jian had reached stability.As a practical tool was soughted after by the nobles of Zhao in the Handan region,the horsehead bronze jian had im- portant archaeological and historical research value.The use of horsehead as ear decoration pattern was a concentrated reflection and microscopic portrayal of the important role played by the horse in the development,inheritance,and evolution of Zhao culture.