A series of experiments on degradation of cyclohexanebutyric acid were performed by 60Co γ-ray irradiation with a dose rate of 0.65 kGy?h–1. The effects of cyclohexanolbutyric acid concentration, H2O2 concentration, initial pH value, and absorbed dose on irradiation degradation efficiency were studied by analyzing the change of chemical oxygen demand (CODCr) and pH value before and after degradation. The results indicated that the higher the initial concentration of cyclohexanolbutyric acid was, the lower the CODCr removal became at the same dose. And the acidic condition was more helpful to the removal of CODCr than neutral and alkaline conditions. Moreover, H2O2 and γ-ray irradiation had a significant synergistic effect, and the irradiation degradation had a promoting effect when the initial concentration of H2O2 was 1 mmol?L–1. The change of CODCr concentration follows the first order reaction kinetics equation.Cited