The normal range of urine microalbumin to creatinine ratio is usually less than 30mg/g. The urinary microalbumin to creatinine ratio can be used to measure the level of urinary albumin in the patient’s organism; less than 30mg/g is the normal level; between 30 and 300mg/g belongs to microalbuminuria; higher than 300mg/g belongs to massive proteinuria. If the presence of microalbumin is observed in urine, it is necessary to look for specific triggering causes, generally including physiological factors, such as dietary factors and strenuous exercise; pathological factors, such as glomerulonephritis, diabetic nephropathy, hypertensive renal damage and so on. Patients with abnormal urine microalbumin to creatinine ratio are advised to go to regular hospitals in time and follow the doctor’s instructions for standardized diagnosis and treatment.