The invention discloses a natural plant oil based hydrophile low-resilience foam which is prepared from a composite and isocyanate, wherein the composite comprises the following components of 100 parts of pluronic polyols, 0-8 parts of cross-linking agent or chain extender, 0-3 parts of catalyst, 0-4 parts of foam stabilizing agent, 0.2-10 parts of foaming agent, 0-5 parts of interface activating agent and 60-100 parts of isocyanate index. A preparation method comprises the steps of: firstly, stirring uniformly the composite, and then adding the isocyanate according to the proportion; secondly, foaming in a die in a closed state to obtain molding foam, or freely foaming in a foaming tank; and cutting to obtain blocky foam after ageing. The regenerable natural plant oil polyalcohol is used in the invention and can be used in various isocyanate systems, and a metal catalyst can not be completely used, therefore, the environment is protected; and 100 parts of isocyanate index can be used, therefore, slow resilience effect and low residue are obtained. The low-resilience foam produced in the invention has the advantages of environment protection, high ventilation, better thermal diffusion and comfort and low temperature sensitivity.