Inclusion Criteria:
1. The patient voluntarily joined the study and signed an informed consent form;
2. ≥18 and ≤ 75 years old, both male and female;
3. Pathologically confirmed hepatocellular carcinoma, at least one measurable focus without local treatment (according to mRECIST or RECIST 1.1 requirements;
4. Eastern Cooperative Oncology Group performance status (ECOG PS) 0-1
5. BCLC-C stage accompanied by tumor thrombosis-associated portal hypertension;
6. Newly diagnosed patients who have not received local or systemic therapy in the past;
7. Expected survival period ≥ 3 months;
8. The functions of vital organs meet the following requirements (no blood components, cell growth factors and other corrective treatment drugs are allowed within 14 days before the first administration): the absolute count of neutrophils≥1.5×10\^9/L; Platelet ≥50×10\^9/L; Hemoglobin ≥60 g/L; Serum albumin ≥28 g/L; Thyroid-stimulating hormone (TSH)≤1×ULN (if abnormal, the levels of FT3 and FT4 should be examined at the same time, if the levels of FT3 and FT4 are normal, they can be included in the group); Bilirubin≤2×ULN (within 7 days before the first administration); ALT and AST ≤5×ULN (within 7 days before the first dose); Serum creatinine≤1.5×ULN;
9. Child-Pugh score ≤ 13 points;
10. Diagnosed with portal hypertension-related complications: Gastrointestinal bleeding; refractory or recurrent ascites; hepatic pleural effusion; portal vein tumor thrombus exceeds 50% of lumen area.
11. Non-surgical sterilization or female patients of childbearing age need to use a medically approved contraceptive method (such as an intrauterine device, contraceptive, or condom) during the study treatment period and within 3 months after the end of the study treatment period; Female patients of childbearing age who undergo surgical sterilization must be negative in serum or urine HCG within 72 hours before enrollment in the study; and must be non-lactating; for male patients whose partners are women of childbearing age, at the last time use effective methods for contraception within 3 months.
Exclusion Criteria:
1. The patient has any active autoimmune disease or a history of autoimmune disease;
2. The patient is using immunosuppressive agents or systemic hormone therapy to achieve the purpose of immunosuppression (dose\>10mg/day prednisone or other curative hormones), and continues to use it within 2 weeks before enrollment;
3. Severe allergic reaction to any compositions of donafenib tablets or contrast media containing iodine ;
4. Central nervous system metastasis;
5. Patients who have received liver transplantation in the past;
6. Tumor thrombus beyond the portal vein range, such as hepatic vein, inferior vena cava, right atrium, splenic vein, superior mesenteric vein;
7. Suffer from high blood pressure and cannot be well controlled by anti-hypertensive drugs (systolic blood pressure ≥140 mmHg or diastolic blood pressure ≥90 mmHg);
8. Uncontrolled cardiac clinical symptoms or diseases, such as: NYHA level 2 or higher heart failure, unstable angina pectoris, myocardial infarction occurred within 1 year, clinically significant supraventricular or ventricular arrhythmia requires treatment or intervention , QTc\>450ms (male); QTc\>470ms (female); Abnormal coagulation function (INR\>2.0, PT\>16s), have bleeding tendency or are receiving thrombolysis or anticoagulation therapy, and allow the preventive use of low-dose aspirin and low molecular heparin;
9. Child-Pugh score \>13 points;
10. Arterial/venous thrombosis events that occurred within 6 months before randomization, such as cerebrovascular accidents (including temporary ischemic attacks, cerebral hemorrhage, cerebral infarction), deep vein thrombosis, and pulmonary embolism;
11. Known genetic or acquired bleeding and thrombotic tendency (such as hemophilia patients, coagulation dysfunction, thrombocytopenia, etc.);
12. Urine routine test showed urine protein ≥ ++ and confirmed 24-hour urine protein content\> 1.0 g;
13. The patient has active infection, fever of unknown origin within 7 days before medication ≥38.5℃, or baseline white blood cell count \>15×109/L;
14. Patients with congenital or acquired immune deficiencies (such as HIV-infected persons);
15. Moderate to severe pulmonary hypertension, pulmonary artery pressure was assessed by ultrasound \>40mmHg；
16. The patient suffered from other malignant tumors in the past 3 years or at the same time (except for cured skin basal cell carcinoma and cervical carcinoma in situ);
17. The patient has previously received other anti-PD-1 antibody therapy or other immunotherapy against PD-1/PD-L1, or has previously received apatinib therapy;
18. According to the judgment of the investigator, the patient has other factors that may affect the results of the study or cause the study to be terminated halfway, such as alcoholism, drug abuse, other serious diseases (including mental illness) that require combined treatment, and other abnormalities which may affect the efficacy and/or safety of patients.
