ObjectiveTo evaluate the clinical value of 18Ffluorodeoxyglucose positron emission tomography(18FFDG PET/CT) in the diagnosis of primary cervical cancer and pelvic lymph node metastasis.MethodsThe clinical data of 57 patients with cervical cancer were retrospectively analyzed.All patients underwent 18FFDG PET/CT scanning pretherapy.The diagnostic results of 18FFDG PET/CT were compared with postoperative pathological findings.ResultsOf the 57 patients with pathologically confirmed cervical cancer，18FFDG PET/CT was positive in 55（55/57，96.5%）patients and negative in 2(2/57，3.5%)patients in the primary lesion.The sensitivity of 18FFDG PET/CT was 96.5%（55/57）.In with 22 patients who underwent surgical treatment, 9（9/22，40.9%） were confirmed pelvic lymph node metastasis by postoperative pathological findings.The sensitivity， specificity， accuracy， positive predictive value and negative predictive value of 18FFDG PET/CT in detect the pelvic lymph node metastasis were 66.7%（6/9），92.3%（12/13），81.8%（18/22），85.7%（6/7），80.0%（12/15）,respectively.Conclusions18FFDG PET/CT has a high sensitivity in diagnosis of the primary lesion of cervical cancer, it can effectively detect primary tumors; in pelvic lymph node metastasis, the diagnosis specificity of this method is high, but sensitivity is moderate, especially the short diameter <1.0 cm lymph nodes.