Purpose: To analyse sonogram and color Doppler flow imaging characterization of cervical diseases by transvaginal color Doppler ultrasound and to discuss its diagnostic value in cervical diseases. Materials and Methods: The study included 212 cases suspected with cervical diseases that were subject to transvaginal color Doppler ultrasound examinations, compared with pelvic examination, surgery, and pathological diagnosis, and analysed the sonogram characterization of transvaginal color Doppler ultrasound retrospectively. Results: In 212 cases, there are 96 cases with a cervical sac, 18 cases with cervix effusion, 35 cases with cervical polyp, nine cases with cervical pregnancy, 13 cases with submucosal uterine fibroids, five cases with cervical fibroids, three cases with double cervix, and 33 cases with cervical cancer. Conclusion: Transvaginal color Doppler ultrasound presents important diagnosis value in the cases of cervical diseases, and is one of the best methods for their early diagnosis.