Abstract: In order to study the effectiveness of Dual-frequency Induced Polarization Ahead-detecting Technology (DIPAT) on the detection of collapse column geological structure hidden behind the excavation face, the paper introduced the method of building the induced polarization model of collapse column based on Simulink. On the basis of the feature of collapse column geological structure, the equivalent circuit simulation model was constructed, which led to the establishment of the induced polarization model. Then the model was connected with the simulation detection model based on DIPAT. Through the simulation detection, the resistivity and the PFE value curves of the model could be obtained. According to the consistency of the simulation detection results and the preinstalled parameters of the induced polarization model, the correctness of the simulation detection model could be proved, which provided a proper reference for the development of instrument based on DIPAT.