Since malignant tumors occur at different sites, have different types, have different stages of disease, and are treated in various ways, the same plan should not be used. Surgery should be preferred if surgical resection is possible, and only surgical resection is possible to cure. The treatment principle of tumor should be comprehensive treatment. Here we introduce the treatment principle and selection order of tumor: 1.Surgical treatment: Generally tumor is a mass, if the mass can be removed and the tumor has not metastasized, it can be cured after surgery. 2.Chemotherapy: If the tumor cannot be removed, or before surgery, chemotherapy can be chosen, that is, chemotherapy, which means taking medicine and injection to kill the cancer cells remaining in the body. Nowadays, neoadjuvant chemotherapy is the most clinically used. 3.Interventional therapy: a kind of chemotherapy, that is, chemical drugs are inserted into the tumor site through a catheter via blood vessels and injected into the tumor site, which has a large local dose and high concentration and good drug effect, and has a small effect on the whole body and less side effects. 4.Radiotherapy: through the radiation principle of cobalt 60 of r-ray, gas pedal of X-ray, X-knife and electron ray, it irradiates local tumor and kills tumor cells, which has less influence on the whole body. 5.Chinese herbal medicine treatment: Using Chinese herbal medicine to clear the heat and detoxify, support the righteousness and dispel the evil, invigorate blood stasis, dissolve dampness and disperse knots, benefit qi and warm yang, clear heat and support the righteousness and enhance the immune principle, decoction of Chinese herbs such as Astragalus, Cordyceps, Xia Cao, Lady’s mantle, jujube, Agaricus, Lycium, Cornu Cervi Pantotrichum, etc. The application of Chinese herbs plays the role of anti-virus and enhancing the immunity of the body. 6.Biological therapy: The emerging biological therapy of tumor makes people see a new dawn in addition to the traditional treatment. It is believed that with the further development of modern molecular biology, molecular immunology and genetic engineering technology and the deepening of the understanding of malignant tumors, more and more strategies will be applied to the biological treatment of malignant tumors, which will play a greater role in the process of malignant tumors from preventable, curable to final elimination. Biological therapy mainly includes gene therapy and immunotherapy. 7.Supportive therapy: It is the basis to ensure the treatment effect of other methods, and sometimes it is the key factor of disease development and regression, especially the support and conditioning of blood system, immune system, digestive system, circulatory system, etc. is more important. Mainly to strengthen nutrition, pay attention to health care, appropriate exercise, improve willpower, enhance self-confidence, adjust the psychological state, so that the body’s immunity to improve, enhance the ability to resist disease, to achieve the therapeutic effect and achieve the purpose of recovery.