Radiotherapy for cervical cancer has a wide range of indications, mainly including: 1. For patients with middle and late stage cervical cancer, radiotherapy is a radical treatment method; 2. For patients with high risk factors for recurrence after early stage cervical cancer, such as lymph node metastasis, positive cut margins and intravascular cancer thrombus, postoperative adjuvant radiotherapy should be performed, which can reduce the recurrence rate by 50%; 3. For patients with recurrence after surgery, radiotherapy should be preferred, which has a higher chance of obtaining a cure again; 4. For advanced patients with distant metastasis, radiotherapy has the role of palliative pain relief and improving the quality of life.