The invention relates to the technical field of building engineering, in particular to a combined shock-insulation rubber support with the ultra-large deformation capacity. The combined shock-insulation rubber support comprises an upper-layer shock-insulation damping system, a lower-layer shock-insulation damping system and a common shock-insulation rubber support arranged below the lower-layer shock-insulation damping system, wherein the upper-layer shock-insulation damping system and the lower-layer shock-insulation damping system are perpendicular to each other in the horizontal operation direction. The upper-layer shock-insulation damping system and the lower-layer shock-insulation damping system are provided with a rubber support system and pin key systems, the pin key systems comprise wedged plates, when a small earthquake occurs, a common shock-insulation rubber support moves horizontally in any direction, when a large earthquake occurs, the pin key systems break horizontally, the upper layer shock-insulation damping system and the lower layer shock-insulation damping system are released, large energy dissipation damping is provided, the horizontal deformation capacity of the integral support is increased, and meanwhile, the rubber support system has a certain recovery deformation capacity. The use of the support is simple, special maintenance is not needed in the operation process, and the pin key systems are convenient to replace.