Urinary tract infection has been recurrent generally six months of continuous antibiotics, if recurrence and pyelonephritis, should remove the triggering factors, according to the results of drug sensitivity to choose effective antibiotics. When urinary tract re-infection occurs more than two times in six months, generally need to take a small dose of antibiotics such as sulfamethoxazole, furotoxin, etc. orally every night before going to bed after urination for six consecutive months. In case of recurrence and pyelonephritis, it is necessary to remove the predisposing factors such as stones and obstruction, and choose powerful antibiotics according to the results of drug sensitization, not less than six weeks of treatment time. Drugs need to be applied under medical supervision. When recurrent urethral infections, drugs should be applied under the guidance of a doctor for treatment, and attention should be paid to drinking plenty of water and changing underwear frequently in daily life.