The invention relates to an assembling type steel beam storage pedestal. The assembling type steel beam storage pedestal is formed by assembling prefabricated steel components with three specifications, each prefabricated steel component comprises an inwards-concave upper surface, an outwards-convex lower surface and inwards-concave or outwards-convex side faces, the inwards-concave and outwards-convex parts are in a frustum shape, the inwards-concave and outwards-convex parts of the different prefabricated steel components correspond to one another in a matched mode, accordingly, the multipleprefabricated steel components are spliced together in the up-down and left-right directions, and a top layer, a middle layer and a bottom layer are formed; the prefabricated steel components, spliced in the left-right direction, of the middle layer and the bottom layer are subjected to pre-stress tensioning in the width direction of the prefabricated steel components through stress relieving bright steel wires, and the two ends of the prefabricated steel components are anchored through anchorage devices; and a rubber supporting seat is arranged between a beam body and the top layer of the pedestal, and stiffening ribs are arranged in the prefabricated steel components on the top layer at intervals. According to the assembling type steel beam storage pedestal, structural component universalization can be achieved, industrialized production of the steel beam storage pedestal is realized, the material turnover utilization rate of the steel beam storage pedestal is increased, and the beam field production cost is reduced.