A Simulating and analyzing method of impedance measurement device for porous medium with natural gas hydrate comprises the following steps of (1), establishing a finite-element value model of a measurement device and a measured sample for aiming at a natural gas hydrate spatial distribution mode; (2), solving the established value model, and obtaining electromagnetic field parameter simulation data; and (3), calculating complex resistivity according to the simulated electromagnetic field parameter simulation data. The method realizes number simulation of an impedance testing process for the porous medium with the natural gas hydrate by means of an impedance measuring device. Through the simulating method and a corresponding data analysis method, the number simulating experiment for an electric parameter measuring device for the porous medium with the natural gas hydrate can be efficiently performed for acquiring electromagnetic field distribution data which contain abundant electric property information, thereby supplying technical facilities for an inversion method for developing a natural gas hydrate spatial distribution mode.