The construction of a fire alarm simulation and really practice system bansed on the High Level Architecture (HLA) , the system frame development, the model design and the interactive 2D or3D true view demosntration have been studied in this paper. This simulating practice system can make use of using computer to proceed the distributing type of fire fight imitating and simulating training, imitating the fire spot and proceeding the true war trains to realize pertinency fire fight practices which are using in different situation. This system can help the fire fighter promote the ability of extinguishing fire to rescue and establish a valid fire fight conductor control mechanism, increase the level of the fire fight unit team.