The invention, which belongs to the technical field of flight simulation, discloses a display system for a flight simulator. The display system is composed of a control signal acquisition and state display module, an avionics calculation host connected to the control signal acquisition and state display module, a plurality of graphic calculation hosts connected to the avionics calculation host, and a plurality of display terminals connected to the graphic calculation hosts. The control signal acquisition and state display module is used for collecting control signals of a plurality of multi-functional display control units and an integrated backup flight instrument and displaying the states of the control signals. The avionics calculation host is used for carrying out logic solution of the control signals, receiving input data of an external system, and transmitting the data to the plurality of graphic calculation hosts. The graphic calculation hosts are used for transforming the received data into corresponding characters, symbols, and data objects, carrying out real-time drawing, and transmitting the data to the corresponding display terminals for real-time displaying. Therefore, the occupation rate of the program system is reduced effectively; the communication efficiency is improved; and the post maintenance is realized conveniently by the system.