The invention discloses a method for evaluating the complexities of runners with rough fractures. The method comprises the following steps: (A) enabling rough surfaces of two rock plates to be in mutual contact, so as to form a sample plate with rough fractures in the middle, and measuring the height h of the sample plate; (B) scanning the two rough surfaces with fractures by virtue of three-dimensional laser scanner, so as to obtain three-dimensional data of the rough surfaces; (C) calculating fracture apertures W(x,y) at different positions; (D) calculating fractal dimension D of the fracture apertures by virtue of a cube coverage method; (E) classifying the complexities of the runners by virtue of the fractal dimension D; and (F) sequentially ranking the types of the runners from best to worst based on the classification result in the step (E) as follows: absolute smooth runners, low-complexity runners, middle-complexity runners and high-complexity runners. According to the method, the digitization of the morphological classification of the runners with the rough fractures is realized for the first time, the complexities of the runners are more directly described, and guidance can be provided for the optimization of fracture construction parameters. The method has wide market prospect.