The invention relates to an aging-resistant and environment-friendly polyurethane foam composite material and a preparation method thereof. It includes material A and material B; material A includes: polyether polyol, polymer polyol, foam stabilizer, catalyst, auxiliary agent, crosslinking agent and foaming agent; material B includes: toluene diisocyanate, modified diisocyanate Benzyl methane diisocyanate; the auxiliary agent is an aldehyde scavenger; the foaming agent is a composite foaming agent, which is composed of a mixture of cyclopentane and n-pentane and pure water. Preparation of material A: heat polyether polyol and polymer polyol, then mix them in the reaction container, add catalyst, auxiliary agent, crosslinking agent, then add foam stabilizer and foaming agent, and react; The preparation method comprises the following steps: mixing and stirring liquefied MDI and polymerized MDI, then adding TDI 80/20, and charging after passing the test. The polyurethane foam produced by the combined material has low density, is environmentally friendly and non-toxic, and has good aging resistance.