As people’s living standards improve, the incidence of diabetes is increasing and the age of onset is getting younger and younger, so the prevention of diabetes in young people is something that we need to pay close attention to in our lives. The main prevention method is to understand the knowledge of diabetes, healthy diet and good lifestyle. For the onset of diabetes is generally a combination of internal and external factors, internal factors refer to genetic factors, which can not be prevented, but can be detected early through regular medical checkups, early consultation to get the right treatment, control blood glucose standards to prevent and delay the occurrence of complications. External factors mainly refer to our lifestyle, mainly unhealthy diet and lifestyle, control of mouth is essential to prevent diabetes. Do not overeat, live and eat regularly, eat carefully and slowly, eat more vegetables, eat less and more meals, control the total amount, drink more plain water every day, do not stay up late, avoid late night snacks, quit smoking and limit alcohol is the basis of diabetes prevention. The second is to adhere to exercise, legs, regular monitoring of weight, to maintain weight at a normal level for a long time. When the weight increases, you should promptly restrict your diet and increase the amount of exercise in a gradual and measured manner so that you can reduce your weight to the standard range as soon as possible. Regular monitoring of blood glucose, blood pressure and blood lipids should be carried out to prevent the progression of the disease by early treatment of abnormal indicators. Therefore, young people need to adopt a healthy lifestyle, reasonable diet and exercise, and regular medical checkups to monitor blood glucose, blood pressure, etc. Once abnormalities in blood glucose occur, they should seek medical attention as soon as possible.