The fractal dimension of fracture surface was measured directly by using projective covering method and laser triangulation technique. Based on the theory of multi fractal, the relationship between multi fractal properties and material components was analyzed and multi fractal characterization of concrete materials was also presented. Preliminary results show that concretes with different composition have the similar multi fractal characterization of fracture surface and the range of fractal dimension varies with the factors including water binder ratio, aggregate size and aggregate type.