In the sales stage of products, because the vast majority of small and medium-sized enterprises are in a relatively weak position in the process of trade circulation, leading to many small and medium-sized enterprises' business income can not be recorded in time, the content of the enterprise's book is more in the form of accounts receivable. Relevant statistics show that the total book value of accounts receivable in the book of small and medium-sized enterprises accounts for 1 / 2 of the total assets of enterprises, but the total book value of accounts receivable in the state-owned enterprises with strong qualifications is less than 1 / 3 of the total assets. So compared with other financing models, this model is widely used. The financing mode of accounts receivable refers to that in the supply chain finance, in order to obtain loans from banks, enterprises in the supply chain (generally small and medium-sized enterprises) take the accounts receivable which can be shown in the book in advance as pledge guarantee, and then obtain bank loans. It should be noted that in this type of trade, the bank does not have the absolute control over the receivables of the enterprise, but the temporary control. Once the enterprise fails to repay on time, the bank will obtain the first repayment right of the receivables of the enterprise through auction and public sale. This kind of financing mode greatly makes up for the lack of short-term capital demand of small and medium-sized enterprises, and promotes the development of the whole supply chain finance.