The utility model discloses a skeleton of special -shaped structure mould, including the base, parallel arrangement has a plurality of crossbeams on the base, still includes a plurality of plywoods, the bottom of plywood is provided with the mounting groove with the gomphosis of crossbeam looks, a plurality of plywood parallel arrangement, the top of plywood is provided with the draw -in groove, is provided with a plurality of ribs through clamping groove parallel, rib and the crisscross network structure that forms in the top of plywood, one deck top plywood is laid in network structure's the outside. The utility model discloses a mutual gomphosis of mounting groove and crossbeam realizes the detachable setting of base and plywood, and mutual gomphosis through rib and draw -in groove realizes that plywood detachable setting in top in the network structure outside, and then realizes the detachable setting of skeleton, be convenient for the installation with dismantle.