The research is a in-depth explore of standardized Chinese medical pattern by analysing the pattern features of the premenstrual syndrome. Methods: According to principles of evidence based medicine, via database retrieval and manual search, documents were collected per inclusion criteria, frequence of premenstrual syndrome and its Chinese medical patterns were calculated． Results: Fifty-five Chinese medical patterns were identified with a totoal frequency of 191. Top 9 patterns were stagnation of liver qi, pathogenic fire derived from stagnation of liver qi, stagnation of liver qi with deficiency of the spleen, hepatic and renal yin deficiency, deficiency of spleen and kidney yang, Qi-stagnancy and blood stasis, asthenic yin causing predominant yang, asthenic yin causing excessive pyrexia, yin asthenia and anger, cardiosplenic asthenia. The main symptoms of each pattern were determined． Conclusion: The results provide reference for future research for standardized Chinese medical patterns, and foundation for futher pathdemiology research.