The utility model discloses an anti-seismic heightening support seat, which comprises a base and a heightening disk screwed with the base, wherein the base is provided with a material filling hole; and the material filling hole is communicated with a screwed inner cavity of the base. In the service process of the support seat, the heightening disk can be upwards adjusted by adjusting the screwing degree between the height adjusting disk and the base, thus the height reduced due to foundation settlement is eliminated and the influence to a bridge, an aqueduct and other large-sized buildings is reduced. The material filling hole of the base, which is provided by the utility model, is communicated with the screwed inner cavity of the base; filler is injected into the screwed inner cavity through the material filling hole, so that after the heightening disk is heightened, the bottom of the heightening disk and the screwed inner cavity of the base can be fully filled with the filler; the heightening disk is supported by using the filled filler, thus the heightening disk is prevented from being suspended, the phenomenon that the strength of the support seat is reduced due to reduction of the screwing degree between the heightening disk and the base is avoided, further the bearing capacity of the anti-seismic heightening support seat is effectively ensured, the safe reliability of the support seat is improved and the service life of the support seat is prolonged.