Urine microalbumin to creatinine ratio of 3.4mg/g is normal. Normal human urine microalbumin to creatinine ratio is less than 30mg/g, this indicator can be used to monitor the human body urinary protein excretion, is a sensitive indicator to reflect the damage of renal function. When the ratio of urinary microalbumin to creatinine is 3.4mg/g, it belongs to the normal reference value range. When this indicator is elevated, it generally suggests that the urine is positive for protein, which may be related to hypertension, diabetes and other diseases caused by kidney disease, and may also be related to primary glomerular disease. In addition, fever, strenuous exercise and other physiological factors may also be one of the reasons for positive urine protein. When the ratio of urine microalbumin to creatinine is abnormal, it is recommended that the patient go to the regular hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or therapy under the guidance of the doctor.