1. Increase food intake: reasonably arrange food intake according to children's age, height and weight, and increase the intake of nutrients such as protein, carbohydrate and fat.
2. Vitamin and mineral supplements: Children can take vitamin and mineral tablets orally, but pay attention to dosage and usage to avoid excessive or improper use.
3. Give high-energy foods: High-energy foods such as milk, eggs, meat and beans can help children gain weight and improve their nutritional status.
4. Nutritional support therapy: For children with severe malnutrition, intravenous infusion can be used for nutritional support therapy to restore health quickly.
5. Strengthen physical exercise: Appropriate physical exercise can promote appetite, digestion and absorption, and help improve children's nutritional level.