The pH of normal urine is 6.0-8.0, if the pH has 8.5 it means the urine is alkaline, it may be caused by chronic urinary tract infection, or it may be caused by unreasonable diet structure, further examination of urine culture is needed. If the presence of pathogenic microorganisms is clear, select sensitive antibiotics according to drug sensitivity, such as levofloxacin tablets and azithromycin tablets for 2-3 weeks of oral treatment, and the pH of urine will return to normal. If the possibility of urinary tract infection is ruled out through the examination, it is usually caused by excessive intake of animal protein in the dietary structure, so you should eat less meat, eat more vegetables and fruits, and drink more than 2000mL of water every day, so that the pH of urine will slowly return to normal.