Chinese medicine is very concerned about the method of decoction of drugs, because it is related to the efficacy. Patients with kidney disease need to take medicine for a long time, it is very important to understand the knowledge of decoction, now introduced as follows: 1, check the drug: see the quality of herbs: before decoction should check whether the drug is complete, if missing, should try to match; at the same time to see the quality of herbs, there is no deterioration, mold, impurities, dust, etc.. 2, decoction before dipping: In order to fully decoct the medicinal properties, generally should be soaked in cool water for 0.5-1 hours before decoction. 3, decoction time: decoction of antiperspirant drugs should be light, 15 minutes after boiling; tonic drugs should be long decoction, about 45 minutes after boiling; other drugs decoction 30 minutes is appropriate. 4, decoction fire: antiperspirant drugs should be martial fire, i.e., large fire; tonic drugs after boiling should be Wenhuo, i.e., small fire long frying. 5.Special decoction: Che Qian Zi and Pu Huang should be decocted in cloth to clarify the liquid; raw gypsum, dragon bone, oyster, ochre and other minerals should be decocted first so as to decoct the medicinal properties; raw rhubarb should be decocted afterwards to induce diarrhea; sand and cardamom should be decocted afterwards so as not to lose the medicinal properties; ginseng and American ginseng are expensive and need to be decocted separately into the liquid so as not to be wasted and to decoct the medicinal properties; Panax ginseng powder is taken with the decocted liquid; Colla Corii Asini, Deer Horns Gum and Turtle Board Gum are decocted for 30 minutes. Gum, deer horn gum and tortoise shell gum are dissolved in the decoction of hot liquid, i.e. melt and take. In short, the purpose of the special decoction method is to fully decoct the medicine according to the performance of the drug, so it must be carried out strictly according to the doctor’s instructions, and those who need special boiling are generally indicated in the upper right corner of the drug. 6, decoction vessels: the best casserole decoction of Chinese medicine, stainless steel pot can also be used. Do not use iron or aluminum pots. The size of the pot is based on the addition of water over the surface of the medicine for a distance; the amount of water should be appropriate when decocting, too much and too little do not meet the requirements, do not add water to the dry pot and decoct. The weight of each dose of medicine should not exceed 400 grams. Too much medicine or too much medicine will not be decocted and will cause waste of herbs.