To analyze Tibetan medicine prescription regarding compatibility between Terminalia chebula and Aconitum and the compatibility attenuated mechanism，and to explore the mechanism and significance of its compatibility. Methods：Analyzed relevant prescriptions from the Si Bu Yi Dian And Zangyi Mi Fang Jing Xuan, and research papers of chemical ingredients. Results：Based on prescriptions under research it has been discovered the dosage of Terminalia was usually greater than the dosage of Aconitu; relevant literature proved attenuated mechanism has material foundation. Conclusion：There has been preliminary revealing of attenuated mechanisms of combined use of Terminalia and Aconitum, further research needs to be done