To observe the cases of TCM syndrome characteristics of single center influenza B in Beijing in the winter of 2017.Methods:A total of 68 cases of influenza B in Beijing Chaoyang Hospital Affiliated to Capital Medical University from January to December in 2017 were retrospectively analyzed by cross-sectional survey.The epidemiology,clinical symptoms and laboratory features of 68 cases of influenza B were retrospectively analyzed,which summarized the symptoms of influenza B of TCM syndromes in winter of 2017.Results:The clinical manifestations of 68 cases of influenza B were fever onset (100%),Tmax (38.6±0.43) ℃,and the fever persisted,with the aversion to cold,cough,sore throat,muscle soreness,headache and other symptoms appeared significantly.Syndrome was based on cold in the Exterior and Heat in the Interior (39.7%),followed by external wind-heat syndrome (14.7%).Epidemiology:68 cases of influenza B were (39.5±15.9) years old,male female ratio was 0.54:1,with basic disease (0.8%),the rate of drug users before treatment (54.4 %),patients without vaccinating against influenza (100%),patients with flu-like illness (48.5%).Laboratory tests:Type B influenza virus strain was Yamagata series,the percentage of neutrophils was not high,and no abnormal situation was seen.Conclusion:68 cases of type B influenza in Beijing single center in winter of 2017 were classified as “Epidemic colds” in TCM.And the clinical manifestations were characterized by cold-heat syndrome of fever,aversion to cold,cough,sore throat,muscle ache and headache.