1, decoction apparatus: casserole is good, can also use enamel pot, stainless steel pot, can not use iron pot, copper pot, aluminum pot, antimony pot. 2, decoction before soaking: before decoction, should be poured into the decoction apparatus, add cold water over the surface of the medicine about 3 cm soaked for about 30 minutes to soak through the herbs, easy to decoction of the active ingredients. 3. Decoction fire: Start the decoction with martial fire (high fire), and then change to civil fire (low fire) after boiling and keep it at a slight boil. The heat source can be taken from gas stove or electric stove. 4. Decoction times: Generally, it is appropriate to decoct each dose of soup 3 times, at least 2 times. 5. Decoction time: Generally, the first decoction of traditional Chinese medicine takes about 30 minutes from boiling water, and the second and third decoctions take about 40 minutes each after adding water. The first decoction of herbal medicine for cold should take about 10 minutes from boiling water. The decoction time of tonic herbs can be extended to about 50 minutes. 6. Special decoction method: ①First decoction: For drugs that are indicated to be decocted first, they should be decocted for about 30 minutes before adding the rest of the drugs to the same decoction. ②Later: For drugs that need to be decocted later, most of them contain volatile active ingredients, or the active ingredients are not resistant to decoction, so it is appropriate to put them in the first decoction when it is about to be finished, and then decoct them together for about 5 minutes. (3) Wrapped decoction: For drugs that need to be wrapped, wrap them in gauze and then decoct them with other drugs. ④Separate decoction: For drugs that require separate decoction, decoct the juice separately and blend it with other decoctions. ⑤Melting: For drugs that need to be melted, they should be melted separately (released into water or heated in the decoction) and taken. (6) Punching: For drugs that need to be poured, it is not suitable to be poured into the decoction, but should be poured directly into the juice or boiling water, or stirred into the decoction to be taken together with the medicine. 7, taking method: generally is decocted once to take once, each time to take about 150 ~ 200 ml. It is best to decoct the drug for 3 times, mix the 3 times decoction and concentrate it to 450~600ml, and take it warm in the morning, in the afternoon and in the evening. 8. Timing of taking medicine: Generally, it is easy to absorb the medicine on an empty stomach. If there is nausea, vomiting, abdominal pain, diarrhea and other gastrointestinal adverse reactions after taking it on an empty stomach, it should be taken about half an hour after meals.