Abstract. The massively increasing of micro, small and medium enterprises (SMEs) is prompting changes in the competition of enterprises and supply chains, which put forward higher requirements to risk controlling level of supply chain financing. The development and innovation of logistics financing provides an effective way to control risks to banks and other financial institutions. This paper researches on the decision-making behavior of the supply chain members composed of a supplier, a distributor and a logistics enterprise under the unified credit granting mode and the case of seasonal inventory impawn. The distributor's reorder and the loan-to-value ratio's decision in different cooperative models are considered as dependent variables. Then, based on Shapley-value theory, the possibility of the existence of alliance cooperation and the appropriate proportion of alliance earnings distributed by the members are validated. A numerical experiment is carried out to verify the conclusion. The result shows that in certain cases when the status of the supplier( as the core enterprise) below the logistics enterprise, cooperating can reduce the request of distributor's size and improve the union gains.