The invention discloses a rapid logging method for high cut slope geology based on a three-dimensional point cloud reconstruction technology. The method comprises the following steps: 1, acquiring data of the unmanned aerial vehicle; 2, carrying out a motion recovery structure process; step 3, post-processing the point cloud data; and 4, identifying and extracting a structural surface. According to the invention, the problems of low working efficiency and high cost of a high-precision three-dimensional laser scanner in the traditional geological logging are solved; the method has the advantages of low cost, easiness in operation, good effect and high efficiency.