Radiotherapy and chemotherapy are the two major means of cancer treatment, but while radiotherapy kills cancer cells, it also damages normal cells and causes a series of toxic side effects. Even some serious toxic side effects make cancer patients worry a lot and discourage them, or give up halfway. However, insisting on taking Chinese medicine during radiotherapy can effectively alleviate the toxic side effects caused by radiotherapy. Chinese herbs for strengthening the spleen and stomach can alleviate the digestive tract reactions of radiotherapy In general, radiotherapy will affect the digestive function, and patients will experience serious discomfort such as anorexia, nausea, vomiting, diarrhea or constipation, which will affect the radiotherapy treatment. According to Chinese medicine, these toxic side effects are mainly due to the damage of body fluids, disharmony of qi and blood, and imbalance of spleen and stomach after receiving radiotherapy. Therefore, the main treatment principle should be to promote the production of fluid and moisten dryness, strengthen the spleen and stomach. Based on our long-term clinical experience, we develop individualized treatment plans for patients who will undergo radiotherapy, and give oral Chinese herbal tonics in advance to strengthen the spleen, harmonize the stomach, regulate qi, and nourish yin. Therefore, during the chemotherapy period, patients have good appetite and have not seen any serious discomfort such as anorexia, nausea, vomiting, diarrhea or constipation, let alone termination of treatment due to toxic side effects of radiotherapy. If it is in the interval of chemotherapy, the next chemotherapy time is short, and the white blood cell decline is obvious, the application of leukostatic agents is not uncommon, but this treatment white blood cell rise is only temporary, two or three days after the white blood cell drop sharply. Inevitably, there is the suspicion of plucking out the flesh to mend the sore. In fact, in this regard, many Chinese herbs in Chinese medicine (such as Astragalus, Ganoderma, Ginseng, Angelica, etc.) can stimulate the body’s hematopoietic system to achieve the effect of replenishing blood and raising white blood cells. The toxic side effects of radiotherapy often make tumor patients unable to bear the continuous treatment, so an interval should be set in the treatment process to wait for the organism to recover. At present, most of the western doctors only wait for the recovery of white blood cells and liver function during the interval between radiotherapy and chemotherapy, or use some whitening agents to make this period a blank period for treatment. In fact, the treatment during this period is very important. The more radiotherapy is administered, the higher the dosage, the greater the toxicity (or damage), and the lower the immune function and the overall body status, the less it can regulate the proliferation of cancer cells, thus making it difficult to stop the recurrence of metastasis. This is the reason why we often see many tumor patients in the clinic who have chemotherapy, recurrence and metastasis at the same time. Long-term clinical practice has led us to an important experience that during the interval between radiotherapy and chemotherapy, patients should use Chinese medicine to regulate under the guidance of doctors and seize the three major links of tumor suppression, immune enhancement and elimination of toxic side effects caused by radiotherapy and chemotherapy. It can not only ensure the smooth implementation of radiotherapy, but also greatly reduce the possibility of transplanted tumor shift recurrence.