1. Provide a balanced diet: The main cause of malnutrition in children is the lack of essential nutrients, so providing a balanced diet is the key to alleviating malnutrition in children. The diet should include proteins, carbohydrates, fats, vitamins and minerals.

2. Increase protein intake: Protein is an essential nutrient for children's growth and development, so increasing protein intake can effectively alleviate malnutrition in children. You can increase your protein intake by eating meat, fish, beans, nuts and other foods.

3. Supplemental vitamins and minerals: Vitamins and minerals are also very important for children's growth and development, so they should be properly supplemented in the diet. Vitamins and minerals can be supplemented by consuming fruits, vegetables and whole grains.

4. Increase Exercise: Appropriate exercise can promote children's appetite and digestion and absorption ability, which can help alleviate children's malnutrition. You can choose sports suitable for children, such as swimming, running, cycling and so on.

5. Psychological counseling: children's malnutrition may lead to low mood, low self-esteem and other problems, so psychological counseling is needed. Parents can give their children enough care and support to help them build self-confidence and a positive mindset.