Stereoscopic ground network is widely used in aerospace,aviation,navigation and other important areas.To ensure the grounding quality of stereoscopic ground network and establish a precise testing method and its evaluation system of grounding resistance,this paper established the equivalent stereoscopic ground model based on the concepts of network graph theory,and derived the least squares model and identification equation which could directly reflect the relationship between branch resistance,node voltage and current through the matrix transformation and elements construction.Meanwhile,described the construction process of the experimental device,developed the user interface of testing and actual measurement data analysis.Through developing the actual identification software and testing system and analyzing the experiment effect of the actual stereoscopic ground test system to verify the feasibility and repeatability of this method,which can obtain satisfactory precision.
