The invention discloses a coarse cereals porridge rice. According to parts by weight, the coarse cereals porridge rice is composed of the following components: 35 to 45 parts of cereals, 5 to 10 partsof coarse cereals B, and 5 to 10 parts of coarse cereals C. The cereal is one or more of Wuchang rice, milled rice with embryo and yellow millet, and the coarse cereal B is one or more of red beans,red lentils, yellow lentils, chickpeas, kidney beans, and instant oatmeal, and the coarse cereal C is one or more of yellow millet, red millet, green millet, black millet, corn bran, oat kernels, rawoatmeal, red quinoa, white quinoa, black quinoa, sorghum rice, yellow rice, coix seeds, black rice, red rice, buckwheat, and highland barley. The preparation process includes the following steps: step1, selecting the cereal A; step 2, selecting the coarse cereal B; step 3, selecting the coarse cereal C; step 4, mixing the materials; and step 5, packaging the product. The coarse cereals porridge rice can not only provide the cereal nutrition required by the baby, but also better adapts to the baby's delicate stomach, and is convenient for parents to cook different kinds of cereals porridge every day.