Decoction is the oldest and most commonly used Chinese medicine dosage form. To treat diseases with traditional Chinese medicine, whether it is a single drug or a prescription composed of multiple drugs, it needs to be boiled to a certain extent, and it can only be taken after adding water, wine or other liquid medicines to make decoction. Therefore, the method of decocting drugs is very particular and has a great decisive role in the curative effect of drugs. Li Shizhen, a physician in the Ming Dynasty, said: "Anyone who takes decoction is good at quality and behavior, while those who take decoction are reckless, have bad fire and water, and the temperature is out of control, so the medicine is useless"; Xu Ling's Theory of Medical Sources in Qing Dynasty said: "The method of decocting medicine is the most appropriate, and the effect of medicine is ineffective, so it depends on it." Although the procedure of decocting medicine is simple, it contains a lot of knowledge. So, how to decoct medicine can effectively play the role of medicine? Let's talk about the container of decocting medicine first. Requirements for decocting instruments? It is best to use a casserole or enamel pot, especially a fire-resistant casserole or pottery pot, because it is evenly heated, stable in nature, thick in soup and high in quality, and an enamel pot is also acceptable. Aluminum pot or copper pots should not be used. Because the metals of aluminum, iron and copper are highly active, they are likely to react with some components in traditional Chinese medicine. This chemical reaction will precipitate some effective components in the medicine, reduce the effective content in the liquid medicine, and produce substances harmful to the human body, resulting in toxicity. ? Li Shizhen once said: "Anyone who avoids copper and iron in decoction should use a silverware crock." . At present, ceramic casseroles with lids are widely used. ? In addition, the capacity of the frying pan is slightly larger to facilitate the continuous tumbling of the liquid medicine during boiling. The lid should be slightly higher to allow water and volatile components to "flow back". The frying pan should always be kept clean, and it is best to remove the residue immediately after each decoction so as not to affect the effect of the next decoction.