Objective To explore the effects of two different gargles on acute oral mucositis during radiotherapy in patients with head and neck cancer.Methods A total of 87 patients with head and neck cancer were randomly assigned to receive either self-made gargle(n=43) or chlorhexidine mouthwash(n=44) within 1 week from the beginning of radiotherapy until week 7(4~5 times per day,10 mL per time).The curative effect and oral mucosa injury were assessed according to the RTOG/EORTC acute radiation mucositis grading standard.Results Compared with chlorhexidine mouthwash group,the self-made gargle induced an increase in the efficiency and a decrease in the incidence of grade Ⅲ acute radiation mucositis(P0.05).Conclusion Oral mucositis is an inevitable complication of radiation therapy for head and neck cancer.The self-made gargle is simple,cheap and effective in prevention and treatment of radiotherapy-induced oral mucositis in patients with head and neck cancer.