Abstract: In order to quantitatively analyze the reliability of the geoelectric section solution, the Monte Carlo error propagation method is introduced into the calculation of simulated annealing method, and the idea and method of calculating and analyzing the confidence interval of the solution of simulated annealing method are proposed preliminarily. Taking Dabaishe seismic station as an example, we first obtain the automatic interpretation result of electrical sounding by RES1D software, and then adjust the layer parameters appropriately as the initial model of simulated annealing process. Finally, the confidence interval of inversion results is calculated by Monte Carlo error propagation method. The results show that the Monte Carlo error propagation method can obtain the confidence interval of the geoelectric section solution better, so as to quantitatively show the reliability of the simulated annealing method and the confidence interval of the geoelectric section solution; the high value of the resistivity in summer, low value in winter and the trend rising change of Dabaishe seismic station in recent years are related to the change of groundwater level, which is consistent with the theoretical analysis of one-dimensional influence coefficient, reflect the reliability of the solution of geoelectric section to a certain extent.