The photocatalytic degradation of bisphenol A (BPA) in aqueous solution with the Fe(NO3)3 catalyst by sunlight irradiation was investigated. The effects of dosing quantity of Fe(NO3)3 , PH, initial concentration and irradiation time on bisphenol A are discussed during the degradation process of BPA. CODCr removal of BPA was determined. The experimental results showed that under the optimum condition, i.e., the mole ratio of ferric nitrate and BPA was 0.8:1, pH value was 3 and the concentration of BPA was 10 mg/L, three days irradiation by sunlight, the removal of BPA was 99.4%, and the COD mineralization rate was 66.8%.