Based on the ETM+ data source in Jiuyi mountain area, the faults in the area are extracted rapidly through information extraction and interpretation. Applying the Box Counting method of fractal to fault structures, the result shows that fault structures have self smilarity and fractal character within the scale range of 005 ～ 275km.As the same time, fractal dimension value is 11155 for the whole area and 09184 ～ 10441 for different strike faults and the square of correlation coefficient is greater than 0996. Fractal dimension value here is close to the stable region of overall tectonic units in China,it not only describes the complexity of the fault distribution and the maturity of tectonic evolution, but also reflects the role in process of mineralization: fractal dimension values access to 10441, the faults mainly being ore transporting structures；fractal dimension values access to 09870, the faults mainly being ore controlling structures；fractal dimension values access to 09502 ,the faults mainly being ore hosting structures.