Abstract: Grid resource allocation is one of the key problems to grid computing.More and more grid researchers are paying attention to the problem of grid resource allocation.In this paper，a novel mechanism of grid resource allocation is given.The mechanism is composed of agent strategies for searching out the best coalitions to join and an multi-party negotiation.Grid resource allocation is realized through forming resource-sharing coalitions.The simulation results show that self-interest agents in computational grids have considerable impact on the decisions of each agent about how to allocate their resource to appropriate tasks.