Abstract:oral administration of Banxia Xiexin decoction could recover MMC normal periodicity of small intestine fron1 irradiation-induced the intestine disorder in rats.The decoction was found to miligate on set of diarrhea(P<0.01)and extend survival time of rats(P<0.01).The observation indicated that the decoction can regulate thedisorder of sn1all intestine motility in rats after irradiation.