To address the issue of heterogeneous communication among multiple modules during the digital simulation phase of civil avionic system design，and improve the efficiency of collaborative simulation across multiple modules and systems，a fully digital simulation platform based on Data Distributed Service (DDS) is constructed.This platform includes three subsystems，namely，console，configurator and data monitor.Automatic configuration of the simulation environment and automatic generation of the simulation framework are achieved via an aviation Interface Control Document (ICD).A standardized message hierarchy is devised for various aviation bus protocols，and a generic communication interface is established using DDS middleware to facilitate multi-protocol data exchange functionality.This ensures dependable communication among multiple simulation modules across heterogeneous platforms.Experimental results demonstrate that the maximum latency of the platform is controlled within 1 ms，with a jitter of less than 200 μs，and a data transmission rate of up to 800 Mibit/s，which effectively meets the data transmission performance requirement of avionics simulation.