The invention discloses a photosensitive imaging composition containing a cyclohexane amide monofunctional acrylate copolymer. The photosensitive imaging composition is prepared from the cyclohexane amide monofunctional acrylate copolymer, alkali soluble film forming resin, infrared absorption dye, background dye and an acid generator. The cyclohexane amide monofunctional acrylate copolymer contained in the photosensitive imaging composition is capable of effectively increasing screentone quality of a printing plate material and increasing the developing latitude; meanwhile, the alcohol resistance of the printing plate material is increased, the plate life of the printing plate material is improved, a dissolution inhibitor in a traditional photosensitive composition is replaced, and the phenomenon of film reduction or dirty formed by too much or too less of the dissolution inhibitor in dosage can be avoided.