The invention relates to an open platform for supporting design, verification and validation of a telex flight control system, which is composed of five function modules, namely 1) a demand analysis, verification and refinement environment module of the telex flight control system; 2) a design, verification and validation environment module of the telex flight control system; 3) a hardware design environment module of the telex flight control system; 4) a project development environment module of flight control software; and 5) a system-level entire digitization, entire duty simulation test and confirmation environment module of the telex flight control system. The open platform can assist flight control system engineers to carry out demand analysis and validation of the telex flight control system, system overall design, verification of a design proposal, system hardware design, system software project development, system-level entire digitization, entire duty simulation test and confirmation to solve the problems of long development cycle, high cost, large risk, and the like brought by development environment. The open platform has wide use value and application prospect in the technical field of system projects.