I can give you some advice on the diet of obese babies. Please note that the following suggestions are for reference only, and the specific diet plan should be formulated according to the baby's age, physical condition and personal needs. I suggest you consult a pediatrician or a professional dietitian for more specific guidance.

1. Control the overall calorie intake: For obese babies, reducing the overall calorie intake is the key. Make sure your baby doesn't consume more calories than he needs to lose weight.

2. Increase the intake of fruits and vegetables: Fruits and vegetables are rich in fiber, vitamins and minerals, which are very important for your baby's health. Encourage your baby to eat more fruits and vegetables of all colors to ensure that you get all kinds of nutrition.

3. Control the intake of high-sugar and high-fat foods: avoid giving your baby too much high-sugar and high-fat foods, such as sweets, desserts and fried foods. These foods will provide a lot of calories, but they lack nutritional value.

4. Balanced diet: Make sure your baby gets a balanced nutritional intake, including protein, carbohydrates, fats, vitamins and minerals. You can consult a professional dietitian to get a diet plan suitable for your baby.

5. Control the intake of snacks and drinks: Try to reduce the intake of baby snacks and drinks, especially sugary drinks and juices. These foods and drinks usually provide a lot of calories, but lack nutritional value.

6. Diet rules: Establish regular eating habits and eat regularly to avoid excessive hunger or overeating. This helps to maintain blood sugar stability and normal metabolism.

7. Family support: create a healthy eating environment in the family and encourage family members to participate in healthy eating choices and cooking methods. Family support is very important to the baby's eating habits. Every baby's situation is unique. It is best to make a diet plan suitable for the baby under the guidance of a professional doctor or nutritionist.