The invention discloses banana and brown rice blended powder capable of relaxing bowels. The banana and brown rice blended powder is prepared from the following raw materials in parts by weight: 60 to 90 parts of brown rice, 20 to 30 parts of buckwheat, 10 to 15 parts of purple sweet potato whole wheat flour, 8 to 12 parts of jack bean meal, 15 to 20 parts of oat bran, 10 to 15 parts of bananas, 10 to 15 parts of figs, 6 to 9 parts of dragon fruit flowers, 4 to 6 parts of whey protein powder, 4 to 6 parts of corn gluten meal, 1 to 2 parts of Momordica grosvenori, an appropriate amount of high temperature resistant alpha-amylase and an appropriate amount of a stabilizer. By adopting germination, extrusion and coprocessing of the high temperature resistant alpha-amylase, the blending property of puffing powder can be obviously improved, the digestion utilization rate of the powder is greatly improved, water-soluble dietary fiber is extracted through ultrasonic enzymolysis after oat bran degreasing, the raw materials are low in cost, the content of the dietary fiber in a finished product reaches the specification of national high dietary fiber food, the raw materials such as bananas and figs are added to improve the single mouth feel of grains, the palatability of the finished product is improved, and the banana and brown rice blended powder has the health efficacy of relaxing bowels after long-term eating.