Abstract: The supply chain coordination of retailers’ capital constraint was studied under the condition of random demands. In the internal financing model， the conditions of supply chain coordination implementation were obtained by using the supply chain members’ expected maximal profit as the objective function. It was found that the use of revenue sharing contract under the internal financing can allow retailers to realize their optimal order quantity without capital constraints， thus improving supply chain parties’ expected revenue and coordinating retailers’ and suppliers’ profit distribution after financing as well. Furthermore， the effects of parameter change on supply chain coordination and coordination condition were explored.

Key words: capital constraint, payment delay, supply chain finance, supply chain coordination