After the collagen and the modified collagen are treated by tannic acid-aluminum, the results show that tannic acid-aluminum reacts to carboxyl, amino and peptide groups, and that hydrogen-bonding take partly important role in this tannage. 用鞣酸铝处理胶原和变性胶原后,红外图谱分析的结果表明,鞣酸铝与胶原的羧基、氨基和肽键区均能产生作用。