ObjectivesTo use the Delphi method to preliminarily perfect the comprehensive evaluation index system which had been initially constructed by systematic review processes of diabetes food for special medical purposes (FSMP).MethodsThree rounds of expert consultation by Delphi method were compared to define indices held in the evidence-based comprehensive evaluation index system of diabetes FSMP and ways to distinguish effects.ResultsThe preliminary perfect index system after 3 rounds of expert consultation contained 4 primary directory indicators, 15 secondary directory indicators, and 20 tertiary indicators. Among them, the end index which could directly be used for evaluation contained a total of 27 indicators.ConclusionsThe index system is categorized into 4 segments of parameters, which are medical, nutritional, safety and other indices, which has addressed the problem posed by CFDA documents on how to scientifically validate the medical effect and safety of FSMP. It provides great significance to assess and supervise FSMP prior to and after it goes to public, assess characteristics and advantages of MNT, and improves nutrition economy and its social benefits.