Objective: To compare efficacy of chemo radiotherapy and single radiotherapy treatment on advanced cervical cancer and its side effects.Methods: A total of 46 cervical cancer cases at II b-IV stage confirmed by pathological analysis were selected and randomly divided into chemo radiotherapy group and radiotherapy group by half.The method and dosage of radiotherapy were the same in two groups.And patients in chemo radiotherapy group also had cisplatin combination chemotherapy for 3 times.every four weeks.Short-term,long-term treatment effects and side effects were observed and compared.Results:The short-term efficacy of chemo radiotherapy group was 95.23%(22/23),significantly higher than 69.20%(16/23) of the radiotherapy alone group(P0.05);3 and 5-year survival rates of chemo radiotherapy group were 86.96% and 65.22%,significant higher than that of the radiotherapy alone group(60.87% and 43.48%)(P0.05);toxicity and radiation adverse reactions of of the radiotherapy alone group was significantly higher than the radiotherapy alone group(P0.05),but after treatment they were tolerable.Conclusions: Synchronous radiochemical therapy have better clinical efficacy than that with radiotherapy alone in treatment of advanced cervical cancer,although with higher toxicity and side effect.But after treatment it can be tolerated,and does not affect the efficacy.