Abstract: Aimed at resources are distributed,heterogeneous characteristics in grid environment,a optimal investment decision model based on T.Cover is presented.Running the model onto the simulator GridSim and comparing it to random algorithm.The results imply that this distribution strategy achieves better performance in the time of completing gridlets and cost,improving the efficiency of resource allocation,it has good adaptability in the dynamic,heterogeneous grid environment,realizes the balancing distribution of grid resources.