Abstract The fractal characteristics of gravity station network in the Tanlu fault zone is researched with methods of the capacity dimension and the information dimension, and in the same time, the fractal dimension and the optimum gridding interval are given.Through the comporison between the gravity isoline diagram of the optimum gridding interval and experimental gridding interval, the conclusion that the optimum gridding interval determined with fractal method is better than the experimental gridding interval is drawn.\
