Current treatment for hemophilia A is based on replacement therapy that is the most effective method by using recombinant clotting factor FⅧ (rFⅧ). Although the safety and effectiveness of replacement therapy has been proved by clinical practice for the last decades, FⅧ products are temporally limited because of a short half-life and requiring prophylactic injections frequently for most patients, usually three times per week or every other day. Frequent intravenous injection not only brings physical pain to the patient, but also produces FⅧ antibodies that seriously affect the treatment effect. In this paper, we review the present status, research progress and main problems of the long-acting recombinant factor Ⅷ.