Objective To study the effects of Banxin Xiexin Decoction and its dismembering on CD4 CD8 of infectious gastrie mucosa induced by H.pylori in mice, and compare the actions of whole decoction with its dismembering. Methods 120 mice were divided into 10 groups at random. The model groups from 1st to 9th were fed the decoction, and after 8 days, expression and count of CD4^+ and CD8^+ and count were observed in succnession. Results In the model group, CD4^+ obviously reduced and CD8^+ increased, and CD4^+/CD8^+ also decreased. In the whole d...