Abstract: OBJECTIVE To establish an index system of access to drugs for chronic diseases, so as to provide reference for relevant policy makers and researchers to evaluate accessibility of chronic disease drugs.METHODS Delphi method was used to conduct two rounds of enquiries on 20 experts to score the proposed index system. The reliability of the index system was judged by the experts’ positive coefficient, the authority coefficient, the concentration of experts’ opinions and the degree of experts’ coordination. Indicators were first selected by the cut-off method, and the final index system was established after the adjustment of indicators concerning experts’ opinions.RESULTS The positive coefficients of experts were 92.31% and 83.33%, the authority coefficients were 0.75 and 0.84, the mean importance scores of indicators were 3.35 and 3.42, and the coordination coefficients were 0.183 and 0.239, respectively. After the adjustment, an index system for the accessibility of drugs for chronic diseases was formed, consisted of 4 dimensions and 21 items.CONCLUSION The index system established in this study through Delphi method is reliable and can be applied to investigate the accessibility of drugs for chronic diseases.