Objective To construct a nutritional support needs system for nasopharyngeal carcinoma radiotherapy patients that is suitable for China's national conditions and to use the Kano analysis method to clarify their demand attributes. Method Used literature analysis semi- structured interviews and Delphi method to form a nutritional support needs system for nasopharyngeal carcinoma radiotherapy patients. A questionnaire survey was conducted on 180 nasopharyngeal carcinoma radiotherapy patients at Peking University Cancer Hospital Yunnan Hospital from January to December 2023. The Kano analysis method was used to clarify the nutritional support needs of nasopharyngeal carcinoma radiotherapy patients. Result The judgment basis coefficients Ca for the two rounds of expert consultation were 0. 901 and 0. 904 respectively. The familiarity coefficients Cs for the indicators were 0. 840 and 0. 845 and the authority coefficients Cr were 0. 857 and 0. 868 respectively. A nutritional care demand indicator system for nasopharyngeal carcinoma radiotherapy patients was ultimately formed which includes 5 primary indicators and 31 secondary indicators. Among the 31 secondary indicators the Kano attribute has the highest proportion of One-dimensional Quality O with 13 41. 9% Must-be Quality M with 10 32. 3% Attractive Quality A with 6 19. 4% and Indifferent Quality I with 2 6. 4% . Conclusion The nutritional support needs system for nasopharyngeal carcinoma radiotherapy patients constructed in this study is reliable and authoritative. Kano's analysis shows that the nutritional support needs of nasopharyngeal carcinoma radiotherapy patients exhibit diversified characteristics. Medical staff should actively meet the expectations and essential attributes of patients and provide and innovate attractive attribute services to improve their medical experience.