Abstract: A retrospective analysis was carried out in 312 cases with cervical carcinoma undergone cystoscopy in a period from May 1993 to May 1995.The results showed that as clinical stages advanced,the bladder involved rate increased(P<0. 01).The accuracy of cystoscopy for detecting bladder involvement of cervical carcinoma was higher than that of B-Ultrasonography.It also indicated that there was a practical significance for cystoscopy to determine the clinical stage,to differentiate the causes of hematuria and to design the treatment plan.