The invention provides a method for utilizing earthquake texture characteristics to identify a minor fault. The method comprises the steps of: 1, inputting superposed earthquake data including fault, construction and rock information of an underground stratum; 2, by means of an image texture analysis method, improving a co-occurrence matrix technology, and calculating earthquake texture characteristics; 3, according to the distribution of the earthquake texture characteristics obtained in the step 2, carrying out high signal to noise ratio processing based on texture control; 4, carrying out fault identification based on an improved three-dimensional inclination angle and curvature; and 5, outputting a fault identification result. By adopting the method for utilizing earthquake texture characteristics to identify the minor fault, the response characteristics of the fault on the earthquake data are outstanding, the minor fault of 5-10 meters is described, and the minor fault identification method is high in sensitivity.