In the big-scale interactive simulation based on HLA/RTI, how to establish information exchange and delivery mechanism of Data Distribution Management (DDM) effectively, has become an important content of distributed interactive simulation. This paper introduces Federation Develpoment and Execute Process Model (FEDEP) and DDM in the simulation of HLA, and then a new DDM algorithm is proposed. The theory and the specific implementations of algorithm were presented. ased on analyzing the simulation system with the DDM algorithm. The result shows that the algorithm could improve data filtering rate effectively, accordingly shorten the simulation time.