The purpose of this study is to evaluate the efficacy and safety of hepatic arterial infusion chemotherapy of oxaliplatin, 5-fluorouracil and leucovorin plus lenvatinib and toripalimab in patients with advanced hepatocellular carcinoma (HCC)

Hepatic arterial infusion chemotherapy (HAIC) of oxaliplatin, 5-fluorouracil and leucovorin was effective and safe for hepatocellular carcinoma. Lenvatinib was non-inferior to sorafenib in overall survival in untreated advanced hepatocellular carcinoma, and programmed cell death protein-1 (PD-1) antibody was effective and tolerable in patients with advanced hepatocellular carcinoma. No study has evaluated HAIC plus lenvatinib and toripalimab. Thus, the investigators carried out this prospective, single-arm study to find out it.

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
• Eastern Cooperative Oncology Group performance status of 0 to 2
• With no previous treatment
• 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 ≥ 32 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