Type 1 diabetes mellitus is a kind of diabetes mellitus caused by destruction of pancreatic β-cells and absolute insulin deficiency. Diabetes mellitus is clinically divided into type 1 and type 2, type 1 diabetes mellitus is due to an unknown cause of pancreatic β-cell destruction caused by increased blood glucose, mostly in children and adolescents, the onset of diabetes mellitus can be manifested as obvious polyphagia, polydipsia, polyuria and wasting “three more and one less” symptom, or many adolescents to the early manifestations of the severity of ketoacidosis and found to be Diabetes. Type 2 diabetes has a strong family history and is most common in middle-aged and older adults. Type 1 diabetes is usually more acute and severe, and there is no cure, requiring lifelong insulin therapy to control blood sugar. It is recommended that patients diagnosed with type 1 diabetes be treated aggressively under the guidance of a doctor.