This is an open-label, multicenter, randomized phase II trial to evaluate the safety and efficacy of atezolizumab in patients with recurrent cervical cancer in second line therapy. A total of 48 patients will be randomized in 3 arms, each arm consisting of 16 patients:

Arm A: atezolizumab monotherapy q3w Arm B: atezolizumab combined with doxorubicin q3w Arm C: doxorubicin monotherapy q3w

Inclusion Criteria:

• Squamous cell or adenocarcinoma of the cervix
• At least one prior chemotherapy regimen for recurrent or advanced disease with a platinum-taxane combination, but not more than two lines of chemotherapy or targeted therapy in recurrent/advanced setting
• Measurable disease
• ECOG≤2
• Adequate pretreatment hematologic, renal and hepatic function test
• Patients are allowed to have had bevacizumab during their prior treatment
• Evidence of non-childbearing status for women of childbearing potential

Exclusion Criteria:

• History of invasive malignancy other than cervical cancer unless there is no recurrence of these other primary tumors the last 3 years.
• Previous anthracycline-based chemotherapy
• Central nerve system metastases and leptomeningeal disease
• Active or history of autoimmune disease
• Prior allogenic bone marrow transplantation or prior solid organ transplantation
• History of idiopathic pulmonary fibrosis
• Known positive test for HIV, or active hepatitis B or hepatitis C
• Known active tuberculosis
• Severe infection within 4 weeks prior to initiation of study treatment
• Prior immunotherapy