The natural of pullulan polysaccharide empty capsule is different from traditional animal source capsule; it is from starch or sugar as raw material, produced by microorganism fermentation extracellular natural polymer polysaccharide products. Has wide applicability, no gelatin crosslinking reaction of amino acid in the risk (crosslinking easily after cause disintegration or dissolve out lower), drug release speed is relatively stable, the advantages of smaller individual differences.