Special high-activity environment-friendly polyurethane thermal insulation material for refrigerator and preparation method of special high-activity environment-friendly polyurethane thermal insulation material

The invention discloses a special high-activity environment-friendly polyurethane thermal insulation material for a refrigerator and a preparation method of the special high-activity environment-friendly polyurethane thermal insulation material. The special high-activity environment-friendly polyurethane thermal insulation material is composed of a component A and a component B, the component A is composed of, by weight, 40-60 parts of polyether polyol A, 30-50 parts of polyether polyol B, 5-20 parts of polyether polyol C, 2.0-3.5 parts of foam stabilizer, 2.0-4.0 parts of water, 2.0-6.5 parts of catalyst and 20-30 parts of foaming agents, and the component B is polymerized diphenyl methane diisocyanate. The preparation method comprises the steps that weighed polyether polyol A, polyether polyol B and polyether polyol C are added to a reaction still according to the proportioning ratio to be stirred, then the weighed foam stabilizer, catalyst, water and foaming agents are added to be stirred for 1.0-1.5 hours at normal temperature, and the component A is obtained; in the use process, the component A and the component B are evenly mixed for a foaming reaction through a high-pressure foaming machine according to the weight ratio of 1:1.05-1.25, and the environment-friendly polyurethane thermal insulation material for the refrigerator is prepared.