The procedure should be performed 3-7 days after the menstrual period, with routine blood tests, urine tests and electrocardiogram before the procedure, and only after the results are normal and there are no contraindications to the procedure. The procedure is as follows: the patient is placed in a bladder truncated position, and the position of the uterus is checked by double consultation; then the vulva and vagina are routinely disinfected with iodine, the cervix is clamped with cervical forceps, the probe enters the uterine cavity and probes the position of the ring, the cervical dilator gradually dilates the cervical opening to No. 5, the IUD is placed in the cervical opening, and the IUD is removed by clamping the IUD in the uterine cavity; after removal, the integrity of the ring is observed and the operation is finished. After the operation, the patient was advised to take rest, abstain from sexual intercourse for two weeks, and antibacterial agent to prevent infection.