The existence of coal seam scouring zone structure would bring adverse effects to the economic benefits and safety production of coal enterprises. The No.22123 Face of Luning Coal Industry Company was located in No.2 coal in the upper part of Jurassic Datong Formation. According to the mining and detection of the working face, it was found that there were a large number of irregular scouring zones in the working face. In order to carry out accurate detection, the mathematical modeling software MATLAB was used to establish the geological model of the coal seam scouring zone. Combined with the ground penetrating radar numerical simulation software gprMax, the forward modeling research was carried out, and the detection results of different radar frequencies and borehole spacing were obtained. The optimal frequency of borehole radar detection in working face and the optimal detection spacing of borehole radar detection were analyzed and summarized.