Aiming at the problem that the Hardware-in-loop Radar model is complex in the network simulation, the equipment cost is high and the versatility is poor, a set of Hardware-in-loop simulation system based on time division multiplexing technology is designed. The Simulation system includes L-band Hardware-in-loop radar system、P-band Hardware-in-loop radar system and P-band Functional Mathematical Model. In the simulation experiment, the radar working sequence file is preliminarily simulated by software, and the working time of the Hardware-in-loop Radar model and mathematical model is controlled according to the document.The L band of Hardware-in-loop radar system or the P band of Hardware-in-loop radar system sub-time repetition is applied, and the simulation results of the mathematical model are analyzed to obtain the target detection results of the network radar. In this paper, we prove that the system can run normally and get the correct simulation result. The realization of the system improves the simulation fidelity and credibility, reduces the equipment cost, simplifies the test method, reduces the difficulty of the experiment.