The utility model relates to a cushion pad capable of greatly increasing the stability in blasting excavation of a rock slope. The cushion pad comprises an inner semi-circular sleeve, an outer semi-circular sleeve, a cushion layer and bolts, wherein the inner semi-circular sleeve is arranged in the outer semi-circular sleeve, the cushion layer is arranged between the inner semi-circular sleeve and the outer semi-circular sleeve, and the two ends are fixed through the bolts. The cushion pad disclosed by the utility model has the beneficial effects that by adopting the technical scheme, energy released by blasting of an explosive can be greatly blocked and cushioned after blasting by adopting the patent technology disclosed by the utility model, then the impact of blasting on a reserved slope rock mass can be greatly reduced, the half-hole rate can be above 95%, the cushion pad can not only prevent rock on the semi-periphery of a blast hole from producing a large number of cracks, but also avoid causing accumulated damages to the rock mass by multiple blasting vibration, so that the stability in blasting excavation of the rock slope is greatly increased, and simultaneously, damages to surrounding buildings and facilities are avoided. Thus, the cushion pad can produce huge economic benefits.