High-toughness and high-strength oligomer and resin composite material and preparation method thereof

The invention belongs to the technical field of epoxy resin modification, and discloses a high-toughness and high-strength oligomer and resin composite material and a preparation method thereof. The composite material is prepared from the following components in parts by weight: 75 to 95 parts of bisphenol A type epoxy resin E51, 5 to 15 parts of polyphenyl ether oligomer and 75 to 90 parts or 25 to 35 parts of curing agent, the total amount of the epoxy resin and the polyphenyl ether oligomer is 100 parts. The invention also discloses a preparation method of the composite material. According to the invention, the bisphenol A epoxy resin and the polyphenyl ether oligomer are blended according to a proper ratio, so that the intersolubility of the bisphenol A epoxy resin and the polyphenyl ether oligomer is good, and the problem of solubility of the thermoplastic resin in the process of toughening the epoxy resin in the prior art is effectively solved; and meanwhile, a crazing shear band is initiated when a cur