Objective To investigate the incidence and influencing factors of olfactory dysfunction in postoperative laryngeal cancer patients.Methods From November 2022 to August 2023,totally 76 postoperative laryngeal cancer patients admitted to the Department of Head and Neck Surgery at Zhejiang Cancer Hospital were selected by convenience sampling.General information questionnaire and the T&T olfactometer were used for assessment.Multiple linear regression analysis was conducted to explore the influencing factors of olfactory dysfunction in postoperative laryngeal cancer patients.Results The T&T olfactometer score for the 76 postoperative laryngeal cancer patients at two weeks post-surgery was(4.74±0.93).Olfactory dysfunction occurred in 76 patients,with 25 cases of anosmia,33 cases of severe hyposmia,17 cases of moderate hyposmia,and one case of mild hyposmia.Multiple linear regression analysis revealed that age,educational level,surgical method,and smoking history were influencing factors for olfactory dysfunction in these postoperative laryngeal cancer patients.Conclusions Postoperative laryngeal cancer patients experience varying degrees of olfactory dysfunction.Healthcare providers should pay special attention to older patients,those with lower educational levels,those undergoing total laryngectomy,and those with a history of smoking.Designing practical olfactory rehabilitation programs and implementing early olfactory training methods can help reduce the incidence of olfactory dysfunction.