The invention discloses an auxiliary
uterine cervix dilator. The auxiliary
uterine cervix dilator comprises an inner
guiding catheter and an outer
guiding catheter. A
cervix dilation
balloon is arranged at the position, close to the head end of the outer
guiding catheter, of the outer side of the outer guiding
catheter, a
vulva limiting
balloon is arranged at the position, close to the
tail end of the outer guiding
catheter, of the outer side of the outer guiding
catheter, two water injection channels are arranged in the wall of the outer guiding catheter and communicated with the
cervix dilation
balloon and the
vulva limiting balloon respectively, and a water
injection port I and a water
injection port II which are communicated with the two water injection channels are formed in the wall of the outer guiding catheter. A
uterus limiting balloon is arranged at the position, close to the head end of the inner guiding catheter, of the outer side of the inner guiding catheter, a water
injection port III is formed in the
tail end of the inner guiding catheter, the water injection port III is communicated with the
uterus limiting balloon through a water injection channel formed in the wall of the inner guiding catheter, and the
tail end of the inner guiding catheter stretches out of the outer guiding catheter and is connected with a
drawing board. The outer guiding catheter is provided with a positioning clamping pin used for fixing the inner guiding catheter. According to the auxiliary
uterine cervix dilator, the
cervix dilation balloon can be accurately limited at the cervix, cervix dilation is facilitated effectively, the internal opening of the uterine cervix can also be dilated appropriately, the cervix cannot be injured, and the auxiliary uterine cervix dilator is safe and convenient to use.