Bismaleimide resin matrix and preparation method and application thereof

The invention provides a bismaleimide resin matrix and a preparation method and application thereof, belonging to the technical field of prepreg preparation. The bismaleimide resin matrix comprises the following raw materials: a bismaleimide resin monomer, a composite process modifier, thermoplastic resin and thermoplastic polyimide micron-sized particles, wherein the composite process modifier comprises diallylbisphenol A and liquid epoxy resin; thermoplastic resin is dissolved in the composite process modifier; and thermoplastic polyimide micron-sized particles swell in the composite processmodifier. The resin matrix improves the interfacial bonding force between thermoplastic resin and thermosetting resin through a phase state angle, and the microcrack resistance after the resin matrixis bonded with fiber is improved; the impact compressive strength of a composite material prepared by the resin matrix is obviously improved, CAI can reach 340 MPa, meanwhile, the resin matrix has good manufacturability and s