The invention relates to a gastrointestinal health beverage. The gastrointestinal health beverage is prepared by using cassia seed phagocytizing oxygen-rich free radicals in corrugations and bifidobacteria in stool and realizing the mass rapid propagation of the bifidobacteria in a culture medium, Oenothera biennis, hawthorn fruit water, and Ipomoea nil water rich in disengaging factors enabling oxygen-rich free radicals in intestinal corrugations and stool to be removed from intestinal walls and timely discharged from bodies. The gastrointestinal health beverage creates a brand new method for eliminating sub-health, guides a development direction for realizing sub-health disease cause eradication through a beverage, and has a huge market in the international and Chinese health preservation filed.