Male hypospadias is one of the most common urethral malformations, and hypospadias repair is also a common operation. In order to successfully complete the operation, preoperative preparation is essential. Therefore, the requirement of preoperative preparation for hypospadias is stricter than that of general urethral surgery. In addition to the general preparation for urethral operation, the following special preparations should be made for hypospadias operation: 1. Patients with urinary tract infection must be strictly controlled before operation. 2. The penis is too small, so it should be treated with androgen, and then operated after the penis develops. 3. Rinse perineum with soapy water and wet compress with chlorhexidine every day for 3 days before operation. 4. Check the position of urethral orifice in detail, correctly estimate the position of urethral orifice retraction after penis straightening, and measure whether the skin of foreskin, penis and scrotum can be used. Through comprehensive judgment, decide whether to adopt one-stage or phased operation and what kind of operation mode to adopt. Patients should be carefully prepared before operation, and they should also know that the anesthesia and posture used in various operations of hypospadias are basically the same. Children and adults can use spinal anesthesia or epidural anesthesia. Hypospadias of penis in supine position, scrotum and perineum cystolithotomy position.