Objectives : Bangyakhappyeon was classified into three tongs of prescription. When juxtaposed with existing publications on oriental medicine, this composition was considerably original. Due to its ease of searching for diseases and prescription, it has been read by not only doctors and researchers but also among general citizens alike. Based on the fundamentals of Bangyakhappyeon composition, this thesis focused on the thorough research on the prescription of Bupleuri Radix mixture. Methods : 42 prescriptions of Bupleuri Radix mixtures have been divided in to three tongs based on the composition of Bangyakhappyeon. Then, these prescriptions, dosage, and composition were researched and organized. Results : After analyzing the prescription of Bupleuri Radix mixture in the Uibanghwaltu chapter of the Bangyakhappyeon text, the following results were attained. 1. Of the 42 prescriptions of Bupleuri Radix mixtures, jungtong constitutes the most prescription at 30, 8 at hatong, and 4 at sangtong. 2. 42 prescriptions are documented into 18 medical divisions and 44 disease symptoms. 3. After analyzing the prescription dosage of Bupleuri Radix mixture, the dosage of Bupleuri Radix was 3 puns to 4 jeons used in 14 sections. Most use was 1 jeon 14 prescriptions, 33.3% were recorded. 4. Invigorating vital function, catharsis, malaria, mediation method, and clearing away method of Bupleuri Radix have a close relationship with the dosage. 5. The 42 prescriptions formation of using Bupleuri Radix consisted of decoction at 39 prescriptions (92.9%) and the others at 3 prescriptions (7.1%). 6. As a result of researching the component of the prescription of Bupleuri Radix mixture, Sosihotang, Soyosan and Bojungikgitang were used as the basic prescription. Conclusions : prescription of Bupleuri Radix mixture in Uibanghwaltu of Bangyakhappyeon as based on Sosihotang, Soyosan and Bojungikgitang, combined with various oriental medicine was found to treat many kinds of diseases.