To reveal the raw materials,technology and property difference of the Qing Dynasty glazed tiles from different regions,the chemical composition of the body and lead glaze of the glazed tiles from the Palace Museum,Beijing and Huangwa klin,Liaoning were analyzed by WDXRF and EDXRF.The thermal expansion coefficiency of the body and glaze was investigated by thermal expansion instrument and theoretical calculation.Based on the result, the correlation of the chemical contents of the body and lead glaze of the glazed tiles and its thermal expansion coefficiency was studied.The results showed that the glazed tiles from the two places have very similar glaze composition but their tile bodies are different.Qing Dynasty glazed tiles from the Palace Museum have Si-Al tile body,while those from the Huangwa klin belong to Si-Al-Mg group.Therefore,their thermal expansions have different correlation factors.