Abstract: Objective To diagnose and distinguish the swell in the infantile scrotum or testicle by the high frequency ultrasonoscopy so as to find the acoustic imaging characters and clinical application value. Methods With the high frequency linear-array probe used,the multi-section and two-side contrast scanning checks were conducted on 46 cases of the infantile scrotum or testicle swell and position with abnormal physical signs.The structures of scrotum,testicle,epididymis and spermatic cord as well as the positions,sizes,forms and interior echoes were observed.When it was necessary,the position should be changed,bladder filled up and the groin and two sides of bladder scanned. Results A total of 45 cases of infantile scrotum or testicle disease were diagnosed by ultrasound,which accorded with the clinical behavior and operation result while 1 case of one-side cryptorchid was not found. Conclusion It is quick and accurate to diagnose the infantile scrotum or testicle disease by high frequency ultrasonoscopy.