The invention relates to a strength-restoring health-care food and preparation method thereof. The health-care food is made of soybean oligopeptide as main component and polysaccharide, complex vitamines, mineral matter, etc, viz. soybean oligopeptide, high-maltose powder, white granulated sugar, vitamine B1, vitamine B2, vitamine C, vitamine E, nicotinic acid, calcium lactate, potassium chloride, sodium chloride, zinc gluconate, L-carnitine tartrate, anhydrous citric acid, acesulfame-k, and IFF concentrated vanilla. The invention is provided with unique formulation, and can rapidly supplying energy and nutrient, especially protein, for dissipating fatigue, promoting restoration of skeletal muscle, strengthening immunologic function, improving motion ability, rapidly restoring physical strength, etc, thereby it can contribute to health, disease-resistance improvement, and motion score improvement, accordingly, the health-care food can be used for soldiers, sportsmen, moderate or hard physical labors in training or working, and be suitable for acute or chronic fatigue patients to use for a long time.