Objective To explore the TCM syndrome classification of dysmenorrhea from the point of view of experts’ experience.Methods The questionnaire on the TCM syndromes of dysmenorrhea was made based on the literature consultation and questionnaire survey with Delphi method.The data was analyzed with the SPSS software for the mathematical statistics and evaluation of positive degree

concentrative degree

coordination degree

and authority degree.Results The return-ratio of first round questionnaire was 96.67% and that of the second round was 100%.Of the 28 syndromes

the important ones were 12

occupying 42.86% of the investigation indices.The variation coefficient of 7 syndromes was smaller than 0.25.The mean value of expert authority degree was 0.82.Conclusion The commonly seen syndromes are qi stagnation and blood stasis

qi deficiency and blood stasis

liver qi stagnation

blood stasis

qi and blood deficiency

liver and kidney deficiency.