The invention belongs to the technical field of health-care foods, and particularly relates to a health-care food for helping children to grow and develop bones and strengthening spleen and stomach and a preparation method thereof. The preparation method specifically comprises the following steps: proportioning black beans, Chinese yams, rhizoma drynariae, Chinese wolfberry fruits, haws, endothelium corneum gigeriae galli, rhizoma polygonati, fossil fragments, pulp of dogwood fruits, rhizoma atractylodis, pericarpium zanthoxyli, Chinese dates and honey-fried licorice roots according to needs, screening, cleaning, sterilizing, soaking, stir-frying with slow fire in a marmite, processing, mixing, drying to form a mixture, and finally crushing into powder of 100-300 meshes to prepare food powder or honeyed boluses or watered boluses or sugar tablets. Compared with other health-care food medicines which have side effects, are not suitable for long-term taking and are very poor in mouth feel, the health-care food has the characteristics of treating both symptoms and root causes, having no side effects, having good nutrition and health-care effects and mouth feel and flavor, being suitable for long-term taking and being convenient to carry.