Abstract: With the deep integration of cyber systems and physical systems, issues such as information latency and data packet loss brought about by communication networks have become increasingly significant in the simulation experiments of power systems. In this context, this paper constructs a general-purpose simulation platform for the Grid Cyber-Physical System (GCPS) using simulation software MATLAB-Simulink and OPNET, and elaborates on the implementation architecture and key technologies of this platform in detail. Finally, the feasibility and accuracy of this simulation platform are validated through examples, providing an essential foundational reference tool for industry researchers engaged in the development and application of the GCPS platforms.