Objective To discuss the clinical characteristics, traditional Chinese medicine（ TCM） pattern distribution,pathogenesis and prescriptions for chronic subdural hematoma（ CSDH）. Methods The clinical characteristics, TCM pattern distribution,pathogenesis,and TCM treatment based on pattern differentiation of 106 CSDH patients were recorded and analyzed by using cross-sectional study. Results The ratio of male to female in 106 CSDH patients was 4 ∶1. The average age of the enrolled patients was 67. 34 ± 1. 38 years old. Among them,69. 8 % of them had a history of traumatic brain injury,23. 6 % had a history of taking anticoagulant or antiplatelet aggregation drugs, and 32. 1 % had recurrent hematoma after drainage operation. The common clinical symptoms of CSDH were manifested as headache, limb paralysis or glossolalia, etc. The main patterns included blood stasis with qi deficiency,phlegm and fluid,and kidney deficiency. Conclusion CSDH is more commonly seen in the elderly with postoperative recurrence. The essential pathogenesis of CSDH is blood stasis and fluid stagnation, the main patterns include qi deficiency and blood stasis,phlegm and blood stasis,and kidney yin deficiency and blood stasis,the basic principles of treatment are to activate blood circulation and eliminate water, and the basic prescription is Taohong Siwu Tang modified with Didang Tang and Yimucao.