Disclosed herein is an anti-skid boot, having a crampon, provided with both an outer sole and a boot body. The anti-skid boot includes a crampon which is provided around an outer surface of a front part of the outer sole. The crampon includes a plurality of triangular protrusions, a plurality of oblique slots and a locking notch. The anti-skid boot further includes a plate spring which is provided between the crampon and the outer sole. The anti-skid boot further includes a plurality of support pins which is fastened to the outer surface of the outer sole after passing through the plurality of oblique slots, and a locking hook which is rotatably coupled to a predetermined position of the outer surface of the outer sole adjacent to each of the opposite ends of the crampon. In the present invention, the crampon is normally located around the outer sole of the anti-skid boot to allow a user to walk on level ground, and the crampon is protruded downwards from the outer sole by only a simple manipulation at need. Therefore, the present invention makes it easy for the user to climb a mountain in the winter regardless of the type of ground, for example, level ground or an icy route. Furthermore, it is unnecessary to put on and take off separate crampons or to keep them separately.