CONCLUSION:Polygonum cuspidetum sieb at suce granules crude drug bag-infusion is superior than other two preparations.It is feasible and can supplant prepared herbal medicine.

• 结论：虎杖生药袋包颗粒剂的煎提效果明显比其它2种入煎汤剂好，方法可行，可替代饮片汤剂。