The stainless steel multifunctional extraction tank is a multi-purpose equipment designed for the boiling and extraction processes in traditional Chinese medicine factories. It can extract, recover alcohol, and separate volatile oils within this process. In addition to the main equipment of the extraction tank, this device is also equipped with a foam catcher, cooler, oil-water separator, etc. These devices are made of stainless steel at all contact points with drugs, and the heating interlayer has been strictly inspected by the pressure vessel inspection department. During the extraction process, this device is composed of a condenser, oil-water separator, and other components, and is completed in a fully sealed and recyclable system. At the same time, organic solvents are recovered from the waste residue.