The invention discloses a preparation method of public healthy breakfast powder. The public healthy breakfast powder comprises walnut, peanut, sunflower seed kernel, black sesame, white sesame, barleykernel, rye kernel, white sorghum, red sorghum, corn, buckwheat, oat, tartary buckwheat, rice, millet, polished glutinous rice, red rice, black rice, glutinous rice, brown rice, coix seed, soybean, black bean, mung bean, pea, cowpea, hyacinth bean, red bean, Chinese yam and red jujube. The preparation method comprises the following steps of baking the food materials at a low temperature of 120-130 DEG C until the food materials are cooked, grinding the baked food materials into ultrafine powder, and performing uniform mixing and stirring to obtain the finished public healthy breakfast powder.The breakfast powder is fine and smooth in mouth feel, sweet in flavor and fragrant in taste, remarkably improves and relieves nutritional imbalance of people, can improve and relieve trouble of constipation, and well improves and relieves cardiovascular and cerebrovascular diseases.