The development and the current research situations at home and abroad of complex resistivity measurement were introduced and existing problems pointed out. A measurement method in time domain with Gaussian White Noise as input signal was proposed. The complex resistivity measurement model was built by simulink in matlab and the simulation was tested. The complex resistivity was obtained combined by time domain and frequency domain method. Then, the comparison and analysis between the calculated value and theoretical value were conducted, and results showed that the complex resistivity gained by this method was coincided with the real electrical characteristics of the model.