The present invention belongs to the technical field of test equipment, and relates to a rock-like sample destruction surface fixation fixture apparatus, wherein the main body structure comprises a front baffle, a rear baffle, a left expansion bush, a right expansion bush, a left stretching bush, a right stretching bush, a left stretching bush cover, a right stretching bush cover, a torsion spring, a wedge block, a lateral expansion gap, scales, a front sliding channel, a rear sliding channel, a wedge block control nut, a wedge block control sliding groove, a left sliding groove, a right sliding groove, a fixture main body, a left bolt and a right bolt. According to the present invention, the inclination angle and the height of the lower end of the cylindrical rock-like sample destruction surface can be flexibly adjusted, the destruction surface can be fixed and balanced, the scanning observation of the cylindrical rock-like sample destruction surfaces with different diameters and different lengths can be met, and the apparatus is suitable for fixing the cylindrical rock-like sample destruction surface and adjusting the inclination angle and the height; and the apparatus has characteristics of simple structure, reliable scientific principle, flexible and easy operation and control way, and broad application prospects.