Atezolizumab plus bevacizumab is the first-line treatment for advanced hepatocellular carcinoma (HCC). However, the effect of the second-line treatment after the progress of Atezolizumab plus bevacizumab therapy remains unsatisfactory. This is a prospective trial to investigate the efficacy and safety of systemic chemotherapy with FOLFOX plus Atezolizumab & bevacizumab as second-line treatment for patients with advanced HCC who previously received atezolizumab plus bevacizumab

Inclusion Criteria:

• The diagnosis of HCC was based on the diagnostic criteria for HCC used by the European Association for the Study of the Liver (EASL)
• Patients must have at least one tumor lesion that can be accurately measured according to EASL criteria.
• Barcelona clinic liver cancer-stage C
• Patients who have previously received first-line treatment with atezolizumab plus bevacizumab and who have shown tumor progression as confirmed by imaging studies. No other systemic treatments have been administered.
• Eastern Cooperative Oncology Group performance status of 0 to 2
• No Cirrhosis or cirrhotic status of Child-Pugh class A only
• Not amendable to surgical resection ,local ablative therapy and any other cured treatment.
• The following laboratory parameters:

Hemoglobin ≥ 8.5 g/dL Total bilirubin ≤ 30mmol/L Serum albumin ≥ 30 g/L ASL and AST ≤ 5 x upper limit of normal Serum creatinine ≤ 1.5 x upper limit of normal INR ≤ 1.5 or PT/APTT within normal limits Absolute neutrophil count (ANC) >1,500/mm3

• Ability to understand the protocol and to agree to and sign a written informed consent document

Exclusion Criteria:

• Evidence of hepatic decompensation including ascites, gastrointestinal bleeding or hepatic encephalopathy
• Known history of HIV
• History of organ allograft
• Known or suspected allergy to the investigational agents or any agent given in association with this trial.
• Cardiac ventricular arrhythmias requiring anti-arrhythmic therapy
• Evidence of bleeding diathesis.
• Patients with clinically significant gastrointestinal bleeding within 30 days prior to study entry.
• Known central nervous system tumors including metastatic brain disease