A Study of TQB2450 Injection in Subjects With PD-L1 Positive Recurrent or Metastatic Cervical Cancer

Inclusion Criteria: * 1\. Understood and signed an informed consent form; 2. Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 1; Life expectancy ≥ 3 months; 3. Diagnosed as recurrent or metastatic cervical cancer; 4. Has received ≥first-line platinum-containing chemotherapy, and disease progress or recur during or after treatment; 5. PD-L1 positive, and the combined positive score (CPS) ≥1; 6. Has at least one measurable lesion; 7. Adequate laboratory indicators; 8. Serum or urine pregnancy tests are negative within 7 days before randomization; Men and women should agree to use effective contraception during the study period and after the end of the study period within 6 months. Exclusion Criteria: * 1\. Combined diseases and medical history: a) Has diagnosed and/or treated additional malignancy within 3 years prior to first dose;b) Diagnosed as other special pathological types, such as mucinous adenocarcinoma, clear cell adenocarcinoma, neuroendocrine tumor and so on;c) Unalleviated toxicity ≥ grade 1 due to any previous anticancer therapy;d) Has received major surgical treatment, open biopsy and so on within 28 days before the start of the study;e) Has a unhealed wound or fracture for a long time; f) Has cerebrovascular accident, deep vein thrombosis and pulmonary embolism within 6 months before the study; g) Has a history of psychotropic substance abuse and unable to quit or mental disorders; h)Has any serious and / or uncontrolled disease; 2.Tumor-related symptoms and treatment: a) Has received surgery, chemotherapy, radiotherapy or other anticancer therapy within 4 weeks before the start of the study; b) Has received proprietary Chinese medicine with anti-tumor indications in the NMPA approved drug instructions within 2 weeks before the start of the study; c) Has received immunotherapeutic drugs against PD-1, PD-L1, CTLA-4 and other related drugs; d) Has uncontrolled pleural effusion, pericardial effusion, or ascites requiring repeated drainage; e) Has symptomatic central nervous system (CNS) disease and/or cancerous meningitis, pia mater disease; 3. Related to treatment of research: a) Has received attenuated live vaccine within 28 days before first dose or planned to received attenuated live vaccine during the study period; b) Has severe hypersensitivity reactions after using monoclonal antibodies; c) Has active autoimmune diseases requiring systemic treatment occurred within 2 years before the study; d) Has a history of active tuberculosis; 4.Has Participated in other clinical trials within 4 weeks before first dose. 5.According to the judgement of the investigators, there are other factors that may lead to the termination of the study.