Comparative analysis of the decolorization of polyssacharide from Ligusticum Chuanxiong Hort using activated carbon,H2O2 and macroporous resin has been studied.The decolorization efficiency of macroporous resin S-8 with its velocity of flow 2~3BV/h,ratio of raw material to liquid 0.33g/mL was much better than the others.The decolorization rate using S-8 was 92.7%,the polysaccharide reserved rate was 93.0%.It is evident that S-8 is suitable for use in decolorization of polyssacharide from Ligusticum Chuanxiong Hort.