Extracorporeal high-frequency thermotherapy refers to the use of electromagnetic waves to penetrate the human body surface and form endogenous heat in the deep part of the body, so as to promote the local blood circulation, improve the local microenvironment, regulate the local immunity and achieve the effects of reducing swelling and relieving pain and killing and controlling tumors. Thermotherapy is a green therapeutic means, which has less impact on human body and less serious complications. Extracorporeal high-frequency deep thermal therapy can be used to treat malignant tumors, because the endothelium of tumor blood vessels is imperfect, and the heat tolerance property is poor, through extracorporeal high-frequency thermal therapy, it can form a thermal field in the location of the tumor, and kill or inhibit the growth of the tumor cells through thermobiological effect. Some benign diseases, such as deep tissue inflammation, pelvic inflammation, peritonitis, arthritis, heat therapy can play a better therapeutic effect.