Aiming at resolving net connection and data/voice transition control problem of the communication control simulation training system of the certain type rocket, design and realize the simulation communication controlling machine. Introduce its design, hardware, main functions and software development background. Adopt VxWorks embedded system to realize simulation for communication controlling machine operation interface, and realize the net training function based on Ethernet. The practice shows that the simulation communication controlling machine can solve the troop simulation training problem and provide methods for improving training efficiency.