For lung cancer patients, radiotherapy is the main treatment, especially when there are mediastinal lymph node metastases or when conventional chemotherapy is difficult to control, radiotherapy is a very important supplement. Lung cancer patients receiving radiotherapy are recommended to eat light, easily digestible and soft food, which is conducive to the replenishment of yin fluid of the spleen and stomach. Vegetables and fruits rich in vitamins and trace elements can also be consumed, and some dairy products and fruit juices can also be better supplemented. In addition, patients can use dietary therapy, such as pear soup or turtle soup for supplementation, which is a better choice. Chinese herbal soup with some foods has better effect on recovery after lung cancer radiotherapy.