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This paper is presented based on paper [I] and recent fruits gained by authors. The research background of a service oriented infrastructure for networkitized M&S, namely simulation grid, is firstly concisely introduced, then combined with authors' recent research on simulation grid, the phased research achievements of simulation grid are introduced in detail, including completed simulation grid prototype named Cosim-Grid 1.0v, some further solved key technologies and typical application demonstration systems on simulation grid. It is shown from the primary practice that the simulation grid developed by authors has the following new features: (1) The architecture of service oriented simulation grid overcomes shortcomings of traditional HLA application on dynamical share, autonomy, fault tolerant, capability of collaboration and security mechanism. (2) A simulation grid prototype named Cosim-Grid1 .Ov has independent copyright and is suitable for networkitized simulation application. It consists of simulation grid PSE, simulation application oriented service middleware, grid middleware GOS and the simulation, grid resources including various encapsulated model resources, simulation tool resources, computing resources, storage resources, data resources, information resources and knowledge resources, etc.. (3) It extends simulation application pattern and implements new simulation method based on Internet and grid. Finally, the conclusion and some further works are given.