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The application discloses a kind of fast self-repairing alkoxylated polyethylene imine material and preparation method and application, it is related to solar photovoltaic packaging material technical field.The method includes alkoxylated ethenyl imidazole imidazolium double trifluoromethane sulfonimide monomer is dissolved in DMSO solvent, then a certain proportion of initiator is added as initiator, and under the protection of nitrogen atmosphere, radical polymerization reaction is initiated at 70~90 ℃, after multiple washing with ethyl acetate, alkoxylated polyethylene imine material is obtained.The application is based on alkoxylated imidazole monomer, through alkylation reaction, ion exchange reaction and radical polymerization reaction, successfully build alkoxylated polyethylene imine material, while designing to realize the fast self-repairing function of packaging material and the effect of inhibiting lead leakage, finally realize the lossless packaging of solar photovoltaic cell, improve the operating stability of photovoltaic product.