Children’s diabetes mellitus is divided into type I diabetes mellitus and type II diabetes mellitus, and the treatment mainly adopts general treatment and drug treatment. 1. Type I diabetes: the root cause of children’s disease is the destruction of pancreatic β-cells, leading to a decrease in insulin secretion or lack of insulin, which needs to be treated with insulin. They should monitor their blood glucose, exercise moderately after the blood glucose is basically controlled, and pay attention to the consumption of low-glycemic index foods such as corn and taro, and avoid the consumption of high-glycemic index foods such as rice porridge and rotten noodles. 2. Type II diabetes: insulin resistance in the early stage and destruction of the pancreatic islet’s own beta cells in the late stage. Children younger than ten years old are generally treated with insulin, and children older than ten years old can use metformin orally as appropriate. The diet should include total calorie control and weight loss. There are other ways to treat diabetes in children, and it is recommended to actively seek medical treatment and scientific treatment. The above medication should follow the doctor’s prescription.