Medicinal tea is made by mixing food or Chinese herbal medicines with tea leaves, decocting or directly soaking in boiling water. Through the interaction between medicine or food and the components in tea, the efficacy of health care or eliminating evil and treating diseases can be achieved. It is the simplest preparation and the most convenient dosage form for taking. Its advantage is that medicinal tea is medicinal tea, which people are willing to accept and can take with them, regardless of time. As most medicinal teas are made of mild food or drugs, most of them have no side effects and are completely reliable even if they are drunk for a long time. In addition, medicinal tea has targeted and specific effects. Long-term drinking, its effective components can reach the quantitative standard in the body, and long-term persistence can get significant curative effect.