Method for determining active fault in bedrock area and width of influence zone of active fault

The invention relates to the technical field of geological survey, in particular to a method for determining the widths of an active fault and an influence zone thereof in a bedrock area, which comprises the steps of determining the position of the active fault, obtaining the shear wave velocity profile of the active fault through cross-fault micro-motion observation, analyzing the shear wave velocity characteristics of a fault fracture zone and the influence zone, and checking geological and geomorphic data. According to the method, an active fault shear wave velocity profile is obtained through micro-motion observation, the widths of a fault fracture zone and an influence zone are determined by combining micro-motion observation characteristics and geological and geomorphic information, and the widths of the fault zone and the influence zone thereof are verified through drilling, groove exploration and footrill modes. According to the method, high-precision micro-motion observation data and a judgment stand