To identify the sites where excavated bronzes were cast, clay cores and pottery fragments found with bronze vessels from four tombs in Yugang, Shengang, Tuanshan, Chenpo in Xiangfan area of Hubei Province were analyzed by X-Ray fluorescence spectroscopy. Analytical results were compared with those from the Houma site in Shanxi and Panlongcheng site in Wuhan. The research indicated that the clay cores of Xiangfan have major chemical compositions similar to those of the pottery fragments and local tomb soil. But these compositions are obviously different from those of the Houma site (Yellow River drainage area) and Panlongcheng site (Yangzi River drainage area). This research indicated that some of the bronzes in Xiangfang were made locally and that the Jianghan drainage area might have its own culture. This is the first time that the chemical compositions of pottery from the same tomb, where bronzed were found, were used to trace the sites of casting of bronzes. This provides supplementary information for identifying the bronze casting sites from clay cores. Combination of information provided by clay cores and pottery represents a new way to identify bronze casting sites.