The invention belongs to the field of polyurethane materials and particularly relates to an environment-friendly degradable flame-retardance polyurethane rapid packaging material and a preparation method thereof. The polyurethane rapid packaging material comprises biomass starch polyether polyol, polyether polyol, a catalyst, a foam stabilizing agent, a foaming agent, aluminum hydroxide, a fire retardant, isocyanate and scrap polyurethane foam particles. The biomass starch polyether polyol is prepared from distilled water, corn starch, composite polyether polyol and saccharose polyether polyol. In the invention, rigid polyurethane foams are prepared from natural biomass raw materials, and scrap polyurethane foams are compounded into a product, so that the polyurethane rapid packaging material has the unique advantages of being reproducible and degradable, being low in cost and easily available in the raw materials and the like. Inexhaustible plant resources are fully utilized, and environmental pollution can be reduced, therefore, the polyurethane rapid packaging material belongs to an environment-friendly material.