As hospitals pay more and more attention to education for diabetic patients, patients are aware of the importance of monitoring blood glucose, but often neglect urine examination, thinking that frequent testing of blood glucose is unnecessary to check urine sugar again. In fact, it is not true, the urine examination is not only to look at the indicator of urine sugar, there are some other indicators need to be observed, the most important of which is the urine protein indicator. In clinical practice, we encounter many diabetic patients who have been suffering from the disease for many years and are found to have protein leakage in their urine at their first visit. The onset of type 2 diabetes is generally insidious, and when elevated blood sugar is detected, the disease is often months, years or even decades old, and is often accompanied by abnormalities in blood pressure, blood lipids and uric acid. The early stage of kidney lesions often have no obvious clinical manifestations and are often overlooked. When symptoms such as back pain, weakness, edema and anemia appear, the kidney lesions have already developed to the middle or late stage. Therefore, regular urine tests and urine microprotein tests can help to detect early kidney problems, so that people can pay attention to them early and make timely adjustments in diet, medication and treatment plans, avoiding drugs that affect the kidneys as early as possible, so that the kidneys can be protected as early as possible to prevent, reduce or delay the appearance of kidney lesions. To do this, urine test is of great value, and it is economical, time-consuming and non-invasive, and is an easy test for patients.