Phase 3 Clinical Project of Pegylated Recombinant Human Coagulation Factor VIII-Fc Fusion Protein

To evaluate the prophylactic efficacy of recombinant human coagulation factor Ⅷ-Fc fusion protein (FRSW117) for injection in patients with severe hemophilia A. To evaluate the safety of recombinant human coagulation factor Ⅷ-Fc fusion protein (FRSW117) for injection in patients with severe hemophilia A. Secondary purpose: To evaluate the efficacy of recombinant human coagulation factor Ⅷ-Fc fusion protein for injection (FRSW117) in hemostasis and surgical hemostasis in patients with severe hemophilia A. To evaluate the pharmacokinetic (PK) characteristics of recombinant human coagulation factor Ⅷ-Fc fusion protein (FRSW117) for injection in treated patients with severe hemophilia A. To evaluate the immunogenicity of recombinant human coagulation factor Ⅷ-Fc fusion protein (FRSW117) for injection in treated patients with severe hemophilia A.

inclusion Criteria： * 12≤ age ≤65 year-old men; * Patients with clinically confirmed severe hemophilia A, i.e. at screening (central laboratory testing) or previous medical records confirm: FⅧ activity \< 1%； * Previous documented treatment with any recombinant and/or blood-derived coagulation factor Ⅷ products or cryoprecipitation products and dosed ≥150 exposure days (EDs≥150) * Normal prothrombin time (PT) or International Normalized Ratio (INR)\3 times upper limit of normal (ULN); or Serum total bilirubin (TBIL) \>1.5x ULN; 8. Patients with abnormal renal function: Creatinine clearance (Ccr) \1.5x ULN; 9. People with active hepatitis C, that is, hepatitis C virus (HCV) antibody positive and HCV RNA positive; Or anti-treponema pallidum specific antibody (TPHA) positive; Or positive for antibodies against the human immunodeficiency virus (HIV); 10. Patients with coagulation dysfunction other than hemophilia A; 11. Have a medical condition that may increase the risk of bleeding; 12. A history of drug or alcohol abuse; 13. Have a known mental disorder that may affect trial compliance; 14. Patients who have received transfusions of blood or blood components within 4 weeks prior to screening; 15. Participants who had participated in other clinical trials within 1 month before screening; 16. Use of any anticoagulant or antiplatelet drugs, off-label maximum dose of non-steroidal anti-inflammatory drugs (NSAID) within 7 days prior to screening; Or patients who need to be treated with anticoagulant or antiplatelet drugs or off-label maximum doses of SAID during clinical trials; 17. Severe cardiovascular and cerebrovascular disease or major thromboembolic events, such as stroke, myocardial infarction, unstable angina, congestive heart failure (New York Heart Association \[NYHA\] grade ≥ III), and severe arrhythmias (including QTc interphase \> 480 ms, corrected by Fridericia formula), uncontrolled hypertension (systolic ≥ 160 mmHg or diastolic ≥100 mmHg), deep vein thrombosis, etc. 18. Study patients who had used emesezumab within 6 months prior to first administration of the drug; 19. Patients who had used monoclonal antibody therapy, Fc fusion protein products (except FRSW107 and FRSW117), PEG products (except FRSW117), or intravenous immunoglobulin infusion within 3 months before the first administration of the investigational drug; 20. Study patients who underwent major surgery within 3 months prior to initial drug administration (major surgery is defined in 6.2.3 Perioperative management); 21. Study patients who have used FⅧ preparation of any standard half-life (e.g., Bycoch, Coproch, Biinidin, Renjie, NoL, Antaine, etc.) within 3 days or 5 half-lives prior to first administration of the drug (taking the elderly); Patients who have used any other extended half-life preparation FⅧ within 4 days or 5 half-lives prior to first dosing (for the elderly); 22. Study patients with fever, severe active bacterial or viral infection, and allergies within 2 weeks before the first administration of the drug; 23. Systemic immunomodulators (such as glucocorticoids \[\> 10 mg/ day equivalent dose of prednisone\], alpha-interferon, immunoglobulin, cyclophosphamide, cyclosporin, etc.) used within 14 days prior to the first administration of the study drug or planned during the study period were allowed to be inhaled, nasal spray, or topical corticosteroids; 24. Those who had been vaccinated within 4 weeks prior to initial administration of the study drug; Or who plan to be vaccinated during PK blood collection (only for subjects in the PK subgroup); 25. Plan to have a child or sperm donation during the entire trial period and within 3 months after the last dose, or do not want to use effective physical contraception (such as condoms, diaphragms, Iuds, etc.); 26. Have other serious medical conditions that the researchers said could not benefit from them 27. Subjects deemed unsuitable by other investigators.