Cervical cancer is treated by various means such as surgery, radiotherapy, chemotherapy, targeted therapy, etc. Among them, radiotherapy is the main treatment, which includes two parts: external irradiation and internal irradiation. External irradiation is usually carried out in outpatient clinic, which is done 5 times a week and takes about 5-6 weeks to complete. Specific irradiation process is as follows: 1, the patient for positioning, positioning after the CT imaging data will be transmitted to the target area outlining system, the physician will refer to the patient’s relevant imaging to further determine the target area, the production of the target area plan, after the completion of the plan is transmitted to the physicists to verify the target area, the target area is determined, the patient based on the target area of the radiation therapy; 2, the internal irradiation of the radiation therapy according to the different dosages of radiotherapy, the number of times also varies, usually general Single 500-600Gy, the number of internal irradiation is usually about 5-6 times, once a week.