[Diagnosis] 1. Patients over 50 years old for anal finger diagnosis or ultrasound examination, pay attention to the presence or absence of prostate enlargement. Shao Kuiqing, Department of Urology, Xiyuan Hospital, Chinese Academy of Traditional Chinese Medicine 2, urine routine, culture, blood urea nitrogen, creatinine, calcium, phosphorus, uric acid. 3, intravenous urography to note the presence of hydronephrosis, bladder diverticulum, prostate enlargement. [Treatment] 1. Intracavitary lithotripsy For stones ≤2cm in diameter. Under cystoscopy with lithotripter, ballistic, laser or liquid electrolysis lithotripter. In combination with bladder neck contracture or prostatic hyperplasia, electrolysis can be performed after intracavitary lithotripsy, or the procedure can be performed in stages. 2. Suprapubic cystotomy is indicated for multiple stones >3 cm in diameter or larger stones with bladder neck contracture, prostatic hyperplasia, urethral stricture or bladder diverticulum.