Diet after chemotherapy: firstly, it should be clean and hygienic; secondly, it should be easy to digest; and finally, it should be nutritious and rich in high-quality protein. Patients are less fit after chemotherapy, their resistance is reduced, and their defense ability against microbial infections such as bacteria and viruses is obviously inferior to that of normal people, so they are required to have a clean and hygienic diet, which must be cooked and thoroughly cooked, and not to eat overnight, cold, cooked food, etc. Otherwise, it is easy to induce acute gastroenteritis, with diarrhea, abdominal pain, fever and other manifestations of gastrointestinal infections. In addition, chemotherapy patients’ intestines and stomachs are damaged by chemotherapy drugs, and their functions are significantly reduced, and they are intolerant to many foods. Therefore, food should be easily digestible, and foods that are cold, fatty, hard and indigestible should not be eaten as much as possible. After chemotherapy patients are weak, we should pay attention to strengthening nutrition, food should be nutritious and rich, eggs, fish and other foods rich in high-quality protein is more appropriate.