Mineral drugs should be decocted first for about 20~30 minutes; herbs with strong toxic side effects should be decocted first for about 45~60 minutes. The specific time should follow the doctor’s instructions, and then under the other drugs combined decoction. Clinical common mineral drugs include magnetite, dragon bone, oyster, corrugated seed, mother-of-pearl, stone cassia, etc. Because of their heavy weight and difficult to decoct the flavor of the medicine, they should be broken and decocted first, and generally need to be decocted for about 30 minutes first, in order to make the active ingredients of them to be fully analyzed. Clinically, there is also a part of the drug with toxic side effects, such as aconite, epiphyllum, fine Xin, etc., also need to be decocted first, in order to play a role in reducing the toxic side effects of the purpose, this kind of drugs usually need to be decocted for about 60 minutes, in order to ensure the safety of medication. Clinically, turtle plate and turtle shell should also be decocted first in order to analyze the active ingredients. Ephedra should also be decocted for two to three times to remove the foam on the water, and then other medicines should be decocted together to avoid heartburn. Patients are advised to seek prompt medical attention if they feel unwell. When decocting Chinese medicines, it is necessary to master the method of decoction correctly under the guidance of professional physicians.