The study of the legal nature of international factoring by the existing literature makes us hardly able to determine the legal nature of international factoring with the features of comprehensive financial services. However,starting from the categories of factoring chosen by the concerning parties to study its legal nature will be helpful to the determination of the concerning parties' rights and obligations and the division of their legal responsibilities. In accordance with the loans,advance payment,management of the accounts related to the account receivables,collection of account receivable and default in providing bad account guarantee which factoring agents supply to suppliers,international factoring respectively has the features of account receivable mortgage,creditor right transfer,and guarantee of agent and debt.