This paper focuses on the resource management technology of large-scale distributed simulation based on grid service. As a data grid, Aegis is established to provide computing service environment and uniform view of various data resources for simulation applications. This paper starts from demands of distributed simulation, introduces the architecture of Aegis simulation grid, discusses the realization of main modules, and establishes a platform of resource management oriented to distributed simulation. Finally, it describes the design and implementation of simulation computing service with the example of tactical notification based on strategy rules, and makes experiments of distributed simulation supported by Aegis simulation grid.