Evolution of breakage for geomaterials is critical step for understanding the complex process of the particle breakage. Research on the breakage of uniformly graded granular materials is the basis of nonuniformly graded samples. This paper starts from the perspective of probability statistics and focuses on the evolution of the three parameters-breakage probability p and crushing state parameter a and b proposing by the authors’ previous works

which are aimed to describe the breakage evolution of uniformly graded granular materials. Through the three selected experimental data with different experimental materials and experimental types

it is suggested that the values of three parameters tend to be a constant value during the development of breakage. This also reflects the existence of ultimate of breakage from the viewpoint of numerical method. Based on these

a method for calculating the ultimate particle size distribution of uniformly graded samples is proposed finally. Then it is easy to obtain the ultimate fractal dimension of the three samples

which is about 2.3

2.34 and 2.28 respectively.