Abstract:Objective：To qualitatively analyze the questionnaire and interview data of patients with gastrointestinal tumors seeking medical treatment，and construct a decision-making model for patients with gastrointestinal tumors based on grounded theory，so as to provide a theoretical reference for guiding patients to seek medical treatment scientifically. Methods：In this study，from July 2022 to February 2023，a questionnaire survey was conducted on 140 patients with gastrointestinal tumors，and 20 medical staff were interviewed in a structured manner. Using the qualitative research analysis tool NVivo11 Chinese version software，conduct qualitative research on questionnaires and interview materials such as word frequency analysis，node coding，and theoretical saturation testing. Results：The word cloud map and statistical table of high frequency words was generated by word frequency query. Three-level node coding was carried out on the questionnaire and interview data，and 5 parent nodes and 12 child nodes were obtained. Based on previous literature research，grounded theory and decision theory，after repeated comparisons，analyzes and classifications，The five core categories of timing selection，hospital selection，treatment choice，coping choice and payment choice construct a theoretical framework for the decision-making model of medical treatment behavior of patients with gastrointestinal tumors. Conclusion：The decision-making model and countermeasures for patients with gastrointestinal tumors can help patients return to rational medical treatment behavior，rationally use medical resources，choose appropriate and moderate medical and health services，effectively prevent and treat tumors，and promote health.