The invention provides a normal-temperature solidifiable single-component liquid sealing material. The normal-temperature solidifiable single-component liquid sealing material comprises methacrylic resin, polyurethane methacrylic resin, methacrylic acid or acrylic acid, isopropyl benzene hydroperoxide, acetylphenylhydrazine, polyvinyl butyral and plastic filler, wherein according to mass proportions, at least one of epoxy methacrylic resin and polyurethane methacrylic resin is selected and accounts for 60%-80%, at least one of hydroxypropyl methacrylate and hydroxyethyl methacrylate is selected and accounts for 10%-40%, isopropyl benzene hydroperoxide accounts for 2%-10%, methacrylic acid or acrylic acid accounts for 1%-8%, fumed silica accounts for 1%-5%, isopropyl benzene hydroperoxide accounts for 1%-10%, polyvinyl butyral accounts for 0%-20%, and acetylphenylhydrazine accounts for 0.02%-0.4%. Compared with analogue materials, the normal-temperature solidifiable single-component liquid sealing material has the advantages that the bonding strength can be adjusted, after being sealed, components can be dismantled, the sealing property of the sealing material is stable, the price of raw materials is low, the storage stability of the sealing material is good, and the production technology of the sealing material is simple.