Objective To analyze the characteristics of Chinese medicine syndromes of type B influenza in Beijing in winter of 2017. Methods A retrospective analysis of cases of influenza B in 5 tertiary hospitals during November to December 2017 was conducted. An Influenza Observation Table was developed to collect patient information including gender

age

onset time

past history

symptoms

signs

tongue picture

etc. The patient’s symptoms

signs and tongue picture on the first

second and third day of onset were analyzed. Results A total of 214 confirmed cases were included. Forty patients were visiting doctors on the first day of onset

82 on the second day

and92 on the third day. On the first day

the symptoms mainly included fever

cough

sore throat

fatigue

and muscle aches. On the second day

the symptoms of aversion to cold were obvious. On the third day

the symptoms of nasal discharge and headache were obvious. There was no significant difference in the above symptoms（incidence rate over50%） within 3 days（P > 0. 05）

and there were significant differences in other symptoms such as nausea and dizziness（P < 0. 05）. The tongue was characterized by red tongue and greasy fur. The pulse condition was mainly floating pulse and rapid pulse from the beginning and slippery pulse was gradually evident in the later period. Conclusion The winter influenza B in Beijing in 2017 belongs to winter warm disease

with syndromes of external cold and internal heat with dampness.