Abstract:The ethereal extract and decoction from raw Semen Armeniacae Amarum were found to induce EBV-EA activation in Raji cells cultured in vitro. Experiments show that both the extract and decoction have tumor-promoting activities,but the EBV-EA activation an be decreased by three kinds of processing-parching,scalding or parching after scalding, of which parching and parching after scalding are better., Moreover , parching after scalding is the best to enhance the relaxing of bowels,inactivate the amygdalase and increase the decoction rate of amygdalin.