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To solve the complex issue of multi-resource transaction in grid environment, based on the economic theory,a multi-resource parallel transaction model is proposed. Then its formal description and the key concepts are given. For the purpose of optimization allocation of buyerpsila s credit on multi-resource, the strategy and a mathematical solution are presented. Finally, service encapsulation of messages on resource nodes during the communication, and the process of multi-resource parallel transaction algorithm are illustrated.It is proved that the model can improve the efficiency of resource management in grid environment.