The principle of reducing stomach by moxibustion is to stimulate various acupoints in the human body, adjust the smooth and orderly operation of meridians and spleen and stomach functions, promote gastrointestinal peristalsis and reduce the absorption of fat, so as to achieve the purpose of losing weight and directly excrete fat. Moxibustion can make which acupoints stimulate the body to generate heat, and then the medicine penetrates under the skin to achieve the effect of losing weight.