The basic performance of bismaleimide resin and the importance of toughening modification are reported in the paper. The methods of modification are reviewed, including allyl compounds modification, binary amine modification, combination of epoxy resin, high performance thermoplastic resin modification, cyanate ester resin modification, synthesis of new type bismaleimide resin, rubber modification, inorganic filler modification, liquid crystal modification, nanometer material modification, fexible material modification, etc. The mechanism of modification is depicted, such as addition reaction, Diels-Alde reaction, oligomerization reaction, Michael addition reaction, copolymerization reaction, crack mechanism of screw anchor, and half interpenetrating network mechanism. Besides, new advancement of the research is discussed.

bismaleimide resin  /  toughening method  /  toughening mechanism  /  diamine  /  epoxy resin