Abstract: Analyzing the features of some typical replication strategies in a collaborative data grid environment and building a benefit function that implies the collaboration among grid nodes to replace local data replication, a replication strategy is proposed taking the benefit function as basis. The results of an experiment done on the grid simulator OptorSim showed that the replication strategy proposed can shorten the time required for system response in addition to the reduced utilization of network and economized consumption of bandwidth/storage resource in comparison with some economy-based replication strategies, thus improving the system performance. The validity of the strategy is verified.