The invention belongs to the technology of deep rock mass construction characteristic research in the field of high-level waste geological disposal research and the filed of engineering geological research, and particularly relates to a drill core direction recovery method. The method comprises the following steps: 1, drawing core base lines; 2, recording core structural faces; 3, measuring and explaining a borehole TV to obtain a borehole wall distribution diagram; 4, calibrating a core, determining reference faces and determining inclination of the reference faces; 5, determining the direction of the base lines, wherein an inclination value Zi of the reference faces is acquired according to a borehole TV measuring result, and then the direction of the base lines can be obtained according to the following equation and the relative positions of the reference faces and the base lines; 6, determining the inclination of the core structural faces, wherein the inclined values of the structural faces within the ranges of the base lines are determined according to the following equation and the relative positions of the structural faces within the ranges of the base lines. According to the technical scheme, the drill core direction recovery method can achieve system recovery of deep drill core structural face occurrence and further provide technical support for deep geological environment research.