Diabetes fasting blood glucose 14mmol/L, 10 years without treatment how long can live, depending on the patient’s condition, age, underlying disease, lifestyle, and many other factors, can not be generalized. Fasting blood sugar of 14mmol/L indicates that the blood sugar is already very high. The main danger of diabetes is that it can cause damage to blood vessels and nerves throughout the body, leading to various macrovascular and microvascular complications. If long-term elevated blood sugar is not treated, it will easily cause cardiovascular and cerebrovascular diseases, serious cardiovascular diseases such as acute myocardial infarction with very high risk of death, and acute massive cerebral infarction with very high risk of death. If long-term elevated blood sugar is not treated, there is a risk of life-threatening acute complications of diabetes mellitus diabetic ketoacidosis or acute cardiovascular and cerebrovascular complications in the short term. On the contrary, if blood glucose is actively controlled at an early stage and controlled at a relatively ideal level, even if the blood glucose is very high in the early stage, if the blood glucose can reach the standard in the long term, the impact on the life expectancy of the patient is not significant. Patients are advised to cooperate with treatment in time to keep blood sugar under control and significantly delay the occurrence and development of microvascular complications, such as diabetic nephropathy and diabetic retinopathy.