An aero tactical data link distributed simulation system was designed based on HLA/pRTI1516 and OPNET by combining HLA distributed simulation technology with OPNET network simulation platform. The problem that OPNET doesnt support HLA underlying software pRTI1516 was solved and OPNETs pRTI1516 communication interface was achieved. The data interaction between external simulation system and OPNET simulation platform was completed and the modeling and simulation of the physical node of the external system in the OPNET was implemented. Finally the performance of Link16 network protocol JTIDS was tested and the feasibility of the system was verified.