Objective: To explore the construction of medical insurance high-quality development index evaluation system in Beijing，and to provide a reference and basis for the objective evaluation and continuous improvement of the development effect of medical insurance in Beijing. Methods: The index system was determined through two rounds of Delphi consultation，based on preliminary literature research and expert discussions，taking into account the national and Beijing's "14th Five-Year Plan" medical security development goals. Results: A system of indicators for assessing the quality development of medical security in Beijing，consisting of five primary indicators14 secondary indicators and 21 tertiary indicators of equity，safety，wisdom，synergy and value and their weights，was formed. The positive coefficient of experts in both rounds of consultation was 100 %，and the authority coefficient of experts was 0.70 and 0.79. Conclusion: The evaluation index system for high-quality development of medical insurance in Beijing is reasonable，scientific and reliable，which can serve as a model for the development and implementation of policies aimed at promoting high-quality medical insurance development.