E-beam　degradation　of　bisphenol　A　(BPA)　was　carried　out,　under　reductive　condition　of　ethanol-water　solution　and　oxidative　condition　of　acetonitrile-water　solution.　The　degradation　efficiency　is　higher　in　oxidative　condition　than　that　in　reductive　condition,　and　increases　with　the　dose　but　decreased　with　increasing　initial　concentration.　The　BPA　radiolysis　follows　the　pseudo-first-order　kinetics.　Adding　H2O2,　or　neutral　condition,　does　not　benefit　BPA　degradation　in　oxidative　conditions.　Pulsed　radiolysis　was　used　to　investigate　mechanism　of　the　BPA　radiolysis.　The　rate　constant　for　BPA　reaction　with　(OH)-O-center　dot　(1.85　x　10(10)　L.mol(-1).s(-1))　is　about　an　order　of　magnitude　higher　than　that　with　e(aq)(-)　(1.80　x　10(9)　L.mol(-1).s(-1)).　The　degradation　products　were　analyzed　by　ion　chromatograph.　Smaller　molecules　such　as　formic　acid　and　acetic　acid　were　detected,　indicating　that　(OH)-O-center　dot　attacks　the　BPA　molecule.　The　work　is　of　significance　for　the　practical　E-beam　treatment　of　waste　water　containing　BPA.