Blood glucose 14.3mmol/L depends on which time of blood glucose in order to make corresponding treatment. First, fasting blood sugar 14.3mmol/L has seriously exceeded the standard, need to be hospitalized to do a comprehensive examination and do intensive insulin therapy to make blood sugar drop to normal as soon as possible to eliminate the damage of high glucose toxicity to the body. Second, postprandial blood glucose 14.3mmol/L, need to recheck fasting blood glucose and glycated hemoglobin to further clarify the diagnosis of diabetes. According to the results of the examination, oral treatment with glucose-lowering drugs such as metformin, gliclazide and acarbose is required. No matter what time the blood sugar 14.3mmol/L has exceeded the standard, you need to strictly control the diet, avoid spicy, fried, sweet and pickled food, eat less and more meals, avoid overeating and drink more water. Actively participate in physical exercise, sleep on time and do not stay up late.