Objective To study Chinese medical pattern characteristic of rheumatoid arthritis（RA）.Methods Retrospective analytical method was used to investigate pattern distribution

age

course

main laboratory index and X-ray stage of 475 RA patients.Results There were great differences in course and pathogenetic condition among different patterns.There was no statistical significance in age

main laboratory index and X-ray although differences existed.Most of the patterns was damp-heat impeding which accounted for 41.7%

then damp-heat impeding with static blood obstructing the network vessels which accounted for 10.9%.Conclusion When it comes to damp-heat impeding pattern

course is short and condition is serious.Pattern of damp-heat impeding with static blood obstructing the network vessels is common in active stage of RA

as damp-heat impeding is easily accompanied with static blood.