: In order to adapt to different work environments,airborne early warning radar hasmany models .The corresponding simulator is the same,and it should be able to achieve arbitrary switching between models. The common platform is designed for this kind of demand. We have to solve two questions during the development, the bottom structure and high-speed communication.The former is based on the DCS architecture, built from the Ethernet attachment. The latter has a high requirement on the real-time data transmission and large capacity. We achieve it with the multicast technology .We added the NTP’s model to make up the weak point on unreliable connection.