Abstract: The condition of adsorbing gelatine by dialdehyde cellulose was investigated, and the adsorption product was analyzed with FT-IR spectrometry and thermogravimetry. The result shows that the optimum absorption conditions are pH value 8 and 40℃.The adsorption capacity increases with raise of time and oxidation degree, and reaches balance in 4h.The adsorption capacity is almost steady when oxidation degree is over 100%.The adsorption peaks of adsorption producthas characteristic of Schiff base in the FT-IR spectra. The initiative thermal degradation temperature rises with increase of adsorption capability.