Abstract: In order to have a more rational complexity evaluation on the fault structure in the mining area,a comprehensive analysis shouldbe conducted on the multi i nformation of the fault. Based on a mine in Xuzhou as an example,the paper analyzed the correlative relationbetween the fractal dimension value,drop,inclination and other factor of the fault and the unit water inflow of the mine water inrush point.A regression model of the fault information and the water inflow was established. With a powerful space analysis function of the Arc GIS,thefault to the water inrush influence function contour map was generated. In comparison with the interpolation result of the single b asis fractaldimension,the regression interpolation model of the auxillary information could be applied to make up the vertical information shortage notexpressed by the fract al dimension of the fault and make up the complexity evaluation under the deficiency of the fault information as wellas to improve the complexity evaluation accuracy of the fault structure. Finally,the grade of the fault structure complexity was divided andcould effectively predict the water inrush occurred.