The present invention discloses a category of benzimadazoles-containing chromophores that have a structural formula shown in formula (1). In the formula, R1 is phenyl or styyl; R2 is nitro; and R3 is nitro, cyano or hydrogen. O-phenylenediamine and carboxylic acid with aniline have condensation reaction under the condition of microwave radiation to prepare benzimadazoles derivatives; the benzimadazoles derivatives have diazo coupling reaction to prepare the benzimadazoles-containing chromophores. The reaction device is simple and safe; the reaction is fast; and the yield is high. The benzimadazoles-containing chromophores have high rate non-linear polarization, high stability and excellent optical transparency, and can be used as novel non-linear optical materials that can be practically applied in electro-optical modulation, optical switching, data storage and other fields.