Introduction: Cervical cancer is the seventh most common and the eighth deadliest cancer in Chinese women. In spite of the advances in multimodality treatment regimens, there were 15-40% patients suffering from recurrence within initial irradiated field[1, 2], of which 95% recurrence occurred within 2 years and only 20% of them could be treated by salvage treatment[3-6]. there were controversies on how recurrent cervical cancer within the irradiated field should be dealt with. Surgery such as pelvic extenteration had to remove involved organs including intestine, rectum or bladder and sometimes led to severe complications and a poor quality of life. After the initial 45-50Gy irradiated to the whole pelvis, it seemed to have minimal space of further re-irradiation for recurrent disease as conventional radiotherapy was applied when considering late toxicities of organs at risk. The radiation dose for pelvic structures received will reach 45-50 Gy, almost reached the upper limits of normal tissues. For recurrent cervical cancer patients receiving retreatment by radiotherapy, the toxicity increased by 30%-56%[2] when conventional technique was applied, toxicities restricted sufficient treatments to the recurrence disease leading to a poor prognosis, which was usually less than a year [8]. IMRT has an advantage over conventional techniques because of delivering a high dose to target volume while sparing organs at risk which were previously irradiated in the primary radiotherapy. We have a five years' experience using IMRT to treat patients with recurrent disease within the previously irradiated field and most of patients showed good response and tolerable complication. According to our retrospective research (publishing), thirty-three patients made a median survival time of 14.06 months, one year overall survival was 55% and 2 year overall survival was 22%, which were better than the results of one year survival 10-20% from previous studies [8]. For further evidence, we designed this prospective clinical trial to evaluate the efficacy and safety when using intensity modulated radiotherapy to treat patients with recurrent cervical cancer within the previously irradiated field.