Radiotherapy has become the main means of integrated treatments for tumor. Malnutrition is one of the most common complications for patients with malignant tumors. It has been shown to have negative effect on cancer patients, such as reducing the tolerance and efficacy of their radiotherapy. Therefore, standardized nutritional therapy has important and positive significance for the treatment and prognosis of cancer patients. At the present time, many radiotherapists begun to explore how to carry out nutritional therapy for those patients, and gradually obtain theoretical achievements and practical experience. The concept of first⁃line nutritional treatment for cancer radiotherapy patients has been widely accepted by radiotherapy doctors, but the level of nutritional treatment carried out by different doctors in different regions and hospitals varies, and there are still many problems in the implementation of nutritional treatment in some regions and personnel. In addition, radiotherapy patients have special characteristics, such as long hospital stay, rapid changes of nutritional condition, and radiotherapy⁃related adverse effects. Its specific strategies and methods of nutritional therapy are not the same as other tumor patients, but also have their own characteristics. Therefore, it is necessary to establish standardized radiotherapy nutrition demonstration ward, which not only plays a demonstrative and guiding role for the other radiotherapy departments, and also effectively prevents the malnutrition of patients with tumor radiotherapy, promotes nutrition treatments. Furthermore, standardized radiotherapy nutrition demonstration ward can improve the safety and quality of life of patients, save health care costs and bring benefits to patients.