As the name implies, dietary therapy refers to the use of reasonable food combination to achieve the purpose of healing. For some metabolic diseases and so on, reasonable diet is extremely important to control and treat the disease, but for most malignant tumors food therapy is ineffective, and so far no food therapy method has been found to cure or control malignant lymphoma. We sincerely hope that patients will not be deceived. In the process of treatment, reasonable diet is necessary, here are some suggestions: 1. It is advisable to drink more water and not to eat acidic food during chemotherapy, especially for first-time chemotherapy patients. Drinking more water and urinating more can wash away the formed tiny crystals, and not eating acidic food and using alkaline drugs to alkalize urine can prevent crystals from forming. 2, do not eat spicy and irritating food 3, do not eat food that has not been heated and sterilized 4, if there is thrombocytopenia, it is advisable to enter the liquid diet or soft food 5, meat and vegetables, to ensure adequate nutrition