1. Background and purpose: The purpose of this study is to find the characteristic of "Donguisasangshinpyun" through comparison and analysis of "Donguisusebowon" and "Donguisasangshinpyun". 2. Methods: First we compare the composition of Sasang prescription with the same name in "Sinchukbon" and "Gabobon" to the composition of Sasang prescription in "Donguisasangshinpyun" "Donguisasangshinpyunchebang"(東醫四象新編劑方). And we compare the difference of "Donguisusebowon" and "Donguisasangshinpyunchebang" about symptom of Sasang prescription. The third is to find the utilization of Sasang prescription in "Donguisasangshinpyun" "Donguisasangyongyakhuebun"(東醫四象用藥彙分). 3. Results and Conclusions: 1) There are some Sasang prescriptions with the same name in "Donguisasangshinpyunchebang", "Sinchukbon" and "Gabobon". The composition of Sasang prescription in "Donguisasangshinpyun" is based on "Sinchukbon" better than "Gabobon". 2) The symptom of Sasang prescription in "Donguisasangshinpyunchebang" are more various than the symptoms in "Donguisusebowon". We find new symptom of Sasang prescription in "Donguisasangshinpyun" that does not exist in "Donguisusebowon". 3) The Sasang prescription of "Sinchukbon" is utilized much more than the Sasang prescription of "Gabobon" in "Donguisasangyongyakhuebun".