PU/CN catalyst synthesized via hot polymerization-impregnation method is used to catalyze the degradation of hair dyestuffs production wastewater by electron beam irradiation.The catalyst is characterized by means of XRD,BET and SEM.The degradation mechanism of the catalyst for phenol and other three target substances is studied.Results show that at an absorbent dose of 9 kG y,COD declines by 54.2%,and biodegradability rises by 62.1%.As for four pollutants at a concentration of 200 mg·L^-1,the removal rates after irradiation range from 82.3% to 92.4%.·OH,· {\mathrm{O}}_2^{-} and h⁺ are identified as the dominant reactive species involved.