[Objective]The research aimed to study the interaction mechanism between aspirin and DNA.[Method]The interaction of aspirin and DNA was studied using UV spectrometry and fluorescence spectrometry.The quenching mechanism of fluorescence of aspirin by DNA was discussed through Stern-Volmer equation.[Result]The results showed that there were strong interaction between aspirin and DNA.The binding constant was 2.17×106 L/mol at 25 ℃.The number of binding sites was 1.773 5.And aspirin binded with DNA in a mode of...