According to the principle of geomagnetic matching navigation,an overall scheme of hardware-in-the-loop simulation is proposed.Based on the model selection and structure of hardware-in-the-loop simulation,the key technologies of geomagnetic database simulation,carrier interference magnetic field compensation,geomagnetic environment simulation and geomagnetic matching navigation algorithm,are analyzed systematically,and the corresponding solutions are put forward,which provides a reference for the hardware-in-the-loop simulation.