Abstract: The present invention relates to the field of polyurethane, and specifically, relates to a polyurethane composed material for furniture sponge and a preparation method therefor. The polyurethane composed material is prepared by mixing a composition A and a composition B. The composition A is prepared from polyether polyol, polymer polyol, a cross-linking agent, a foaming agent, a foam stabilizer, a pore-opening agent, and a catalyst, and the composition B is prepared from the polyether polyol, isocyanate, and the pore-opening agent. When the combined material is used, the composition A and the composition B are mixed according to the weight ratio of 100:75-110 and injected into a mould, so that high-bearing and low-density furniture sponge is prepared.

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