Many tumor patients do not know when to choose Chinese medicine for treatment, and some think that Chinese medicine is slow in taking effect, and they can only choose Chinese medicine treatment after all the western treatments have been finished or when the western treatments are unable to treat them. This is a big misunderstanding. In fact, Chinese medicine should be used throughout the treatment of tumor in order to make patients get the best therapeutic effect to a greater extent. The principle of Chinese medicine in treating tumors is dialectical treatment and supporting the right and dispelling the evil. 1. Dialectical treatment is to use the four diagnostic methods (looking, smelling, questioning and cutting) to formulate the rationale and prescription according to the patient’s symptoms, tongue diagnosis and pulse. Diagnosis and treatment is the soul of traditional Chinese medicine, malignant tumors is a complex disease, each person’s symptoms are not exactly the same, each focus on the period of development of the disease is not the same, so it is necessary to individualize the treatment, according to each patient’s characteristics of the choice of drugs, that is, according to the person, according to the time, according to the local conditions, or referred to as the “three causes” of the appropriate. For a long time, in order to eliminate local tumors, some aggressive treatments have damaged the patient’s immune function and shortened the patient’s life. Even if the tumor disappears temporarily, it will recur soon, and the tumor that recurs again has already produced multi-drug resistance, and its progress is rapid and difficult to eliminate. Chinese medicine believes that the occurrence of malignant tumors is mainly due to the insufficiency of the body’s positive qi, and external evils take advantage of the deficiency. “Positive” means righteousness, including the functional activities of the human body and its ability to resist diseases; “evil” means evil, referring to various internal and external disease-causing factors. It is recorded in “The Internal Canon” that: “When positive qi exists inside, evil cannot be dried up” and “When evil comes together, its qi must be weak”. Therefore, when treating malignant tumors, Chinese medicine pays more attention to eliminating the evil and supporting the positive at the same time, so that the patient’s qi, blood, internal organs and functions can be harmonized and yin and yang can be balanced, and the ability of eliminating tumors will be stronger or the patient can survive with tumors for a long period of time. Secondly, Chinese medicine is used throughout the treatment of tumors. In the treatment of tumors, regardless of domestic and foreign countries, Chinese medicine and western medicine, we all hope for early detection, early diagnosis and early treatment, but in reality, there are not many chances to realize the “three early”, and most of the patients have already been found to be in the middle or late stage, and even if they are able to be surgically resected, it is impossible to cure them completely, and it is necessary to continue the treatment. Chinese medicine treatment can bring benefits to both early and late-stage patients. Prof. Sun Yan and Prof. Chu Datong, famous western medical oncologists with good reputation at home and abroad, advocate that the combination of Chinese and western medicine is more effective in the treatment of tumors. 1.Cooperation with surgery in early stage: Before surgery Prepare for surgical resection, improve the function of certain organs of the patient, such as liver function, heart function, etc., as well as improve the physical condition of the patient, so as to make him/her better able to complete the surgery. After surgery Accelerate postoperative recovery, long-term use can improve physical condition, improve immune function, avoid or reduce recurrence and metastasis, and improve long-term efficacy. 2.Cooperation with radiotherapy and chemotherapy: Chinese medicine can effectively prevent or reduce the toxic side effects of radiotherapy, such as: reduction of blood cells; gastrointestinal reactions, such as nausea and vomiting, abdominal distension and nausea; liver, kidney and heart damage; numbness of hands and feet, nerve damage; fever and so on. 3.Mid-term: Usually lose the chance of surgery, the patient’s body is relatively weak, and a series of symptoms, at this time should be based on traditional Chinese medicine to support the positive and eliminate the evil, enhance the body’s positive qi, so that the body has the ability to do to drive away the evil and improve the symptoms, and can also be used with appropriate radiotherapy to achieve the best results. 4, late: late patients are mainly to Zhengqi deficiency, and there are a variety of late complications, surgery and radiotherapy are not suitable, then the main use of traditional Chinese medicine to support the correctness of the deficiency, improve the body’s positive qi, and at the same time exclude the evil, to maximize the quality of life of the patients and prolong the life expectancy. There are also some old and frail patients with complications and past medical history (such as diabetes, cardiovascular and cerebrovascular diseases, etc.), even if they are detected earlier, they are unable to undergo surgery and radiotherapy, and then Chinese medicine is the best choice for their treatment.