The invention discloses a high-definition video conference system adopting a Zhongtong satellite network. The high-definition video conference system comprises a satellite ground station, a movable Zhongtong emergency satellite communication vehicle and a static Zhongtong emergency satellite communication vehicle, the satellite ground station comprises a satellite communication system, an Ethernetswitch, a video module, a voice module and a data module, a movable Zhongtong satellite antenna module, a satellite MODEM, the Ethernet switch, a VOIP voice gateway, a teleconference terminal, a vehicle-mounted phone, a vehicle-mounted indoor / outdoor camera, a display screen, a wireless single pawn video transmission system and a camera are installed in the movable Zhongtong emergency satellite communication vehicle. When the high-definition video conference system is in use, fast two-way broadband satellite link access can be achieved, an SCPC satellite channel is established, and dynamic image, voice and data transmission are achieved; and dynamic and static image, voice and data transmission are achieved, multiple communication modes coexist, multi-channel dynamic communication is provided for emergency command, and the system bandwidth resources are saved.