Radiotherapy for nasopharyngeal carcinoma generally adopts combined facial and cervical fields, and oral mucosa is within the scope of radiotherapy. If oral mucosa damage occurs during radiotherapy, patients must avoid spicy, stimulating and acidic food, otherwise they will experience oral mucosal pain, even because nasopharyngeal carcinoma is prone to cervical lymph node and supraclavicular lymph node metastasis, patients must pay attention to not smoking and at the same time avoid spicy and stimulating food because Oral mucosa and various pharyngeal mucosa damage can occur. During radiotherapy for nasopharyngeal cancer, it is necessary to eat light, less residue, high fiber, high protein and high vitamin foods, which can promote the repair of damaged skin mucosa and oral mucosa, and at the same time improve the symptoms such as loss of appetite caused by patients during radiotherapy. Therefore, during radiotherapy, it is generally advocated that patients with nasopharyngeal cancer should eat light, easily digestible, high-fiber, high-protein and low-fat foods to alleviate patients’ adverse reactions caused by damage to skin mucosa during radiotherapy.