The cervical cap belongs to a type of contraceptive device used by women. It is placed deep into the vagina before intercourse and covers the cervix. Precautions include contraindication for those who suffer from bladder bulge, rectal bulge, uterine prolapse, vaginitis, and vaginal stenosis. First of all, the cervical cap should be selected according to the gynecological examination of the cervix before use cervical cap test placement, with the thumb and forefinger pinch flat cervical cap, along the posterior wall of the vagina upward pushed to the depths, so that the cap covers the cervix, squeeze the top of the cap, forcing the air to be discharged, and the edges of the cap pressed tightly around the cervix, the spermicidal agent should be added to the cap before placement. The cervical cap can only be used for contraception if there are no contraindications after gynecological examination such as bulging bladder, bulging rectum, prolapsed uterus, vaginal stenosis, vaginitis, severe cervical erosion, and so on. It is recommended that women who need to use cervical caps should do so under the guidance of a doctor.