Objective To summarize the characteristics of TCM syndrome of epidemic encephalitis B by retrospective analysis,provide the reference for the clinical diagnosis and treatment. Methods A form of collecting TCM syndrome was disigned and filled.Clinical date were collected from 85 cases of epidemic encephalitis B. We analysised and con-cluded the characteristic of TCM syndrome. Results The main TCM syndrome included fever and nausea ,coma and aversion to cold,shiver, vomiting,sag,convulsion,drowsiness.The classification of TCM syndromes were two types. One was the harm with QIFEN and YINGFEN,the other was the harm with WEIFEN and QIFEN. Conclusion The main classification of TCM syndromes of epidemic encephalitis B was the harm with QIFEN and YINGFEN,it was serious, but the other one was eusemia.It is important to treat in QIFEN phase ,which will control the patient ’s condition.