Decreased glucose tolerance belongs to pre-diabetes, which can be intervened by adjusting diet, exercise therapy, anti-diabetic drug therapy, etc. It is recommended to follow the doctor’s instructions for treatment. 1. Dietary adjustment: control energy intake, rational allocation of nutrients, avoid excessive fluctuation of blood glucose and obesity, and medical nutritional therapy under the guidance of a doctor. 2. Exercise therapy: regular and moderate exercise can increase insulin sensitivity, control blood glucose and reduce the risk of cardiovascular disease. 3. Medication: When the effect of lifestyle intervention is not good, metformin, acarbose and other anti-diabetic drugs can be used to control blood sugar. It is recommended that patients with decreased glucose tolerance should go to regular hospitals in time to improve the relevant examinations and standardize the treatment under the guidance of the doctor, so as to avoid delaying the condition or causing adverse reactions.