The invention belongs to the field of geo-data processing, and in particular relates to a method for rapidly measuring information dimensions of fault structures. In the method, a researched area is divided into grid units (2 to the power of an integer) along transverse and longitudinal directions respectively so as to realize accurate successive dichotomy of the researched area along the transverse and longitudinal directions, thus achieving the purpose of rapidly and accurately measuring the information dimensions of the fault structures in single or a plurality of areas; and meanwhile, the probability of the fault structures is calculated by utilizing the faulted length instead of the number of faulted segments, thus being more coincident with the actual geological condition.