Abstract: Hydraulic flushing is one of the main outburst prevention measures adopted in high outburst coal seam, but the evaluation of its impact range is always lack of good means, and the electrical method is a widely used evaluation method. The response principle of the apparent resistivity of coal and rock mass during hydraulic flushing process was introduced, the inversion modeling of the apparent resistivity method of hydraulic flushing was established, the inversion numerical simulation was carried out with four kinds of arrays and verified by the field test. The result shows that the apparent resistivity method has a good response to the apparent resistivity of the coal and rock mass during hydraulic flushing process; the water and gas in the crushing zone and the seepage area have little influence on the simulation results and can be neglected; the lateral resolution of the four arrays is better, the variation trend of the apparent resistivity in each inversion result appears consistent with each other; the detecting depth of the pole-pole array is much deeper, the horizontal and vertical resolution of the borehole is much higher, therefore, priority should be given to the pole-pole array in hydraulic flushing exploration; the result of field test verifies the effectiveness of the pole-pole array.