The principle of eliminating dampness of Xihuangyi wet tea is to strengthen the spleen and regulate the stomach, because moisture is the source of all diseases. When the spleen and stomach are good, moisture will be reduced and people's mental state will be improved. In fact, the function of our spleen is to discharge and recycle the moisture, waste gas and excess water accumulated in the human body through diet and external factors, so spleen deficiency can not transport the excess water out of the human body, which will cause moisture. Of course, puffiness edema caused by moisture can be improved and lost weight through the principle of eliminating dampness.