Reversible desulfurizing absorbant based on the modification of biomass and its prepn

The present invention discloses a reversable desulfur absorber based on biomass modification and its preparation. In the invented modified rever sable desulfur absorber biomass is used as additive, the biomass includes, the stem, leaf, root etc. of agricultural crop rice, wheat, cereal, corn and grass, tree leaf, waste paper, wood, saw dust etc. The preparation method is as follows: macerate or dip biomass and desulfur absorber in water, then dry to obtain product. Advantages: low price, simple modification method, low energy consumption, low cost etc.