In this study, electron beam irradiation technology was used to degrade torasemide in an aqueous solution. By investigating the degradation effect, its influencing factors, and degradation products, the radiation degradation characteristics and possible degradation pathways of torasemide were systematically discussed. The study demonstrated that torasemide can be effectively degraded via electron beam irradiation. The experimental results showed that the active •OH particles played a dominant role in the degradation process. The initial torasemide concentration, absorbed dose, pH of the solution, amount of H₂O₂ and inorganic anions ($\mathrm{C}{\mathrm{O}}_{\mathrm{3}}^{\mathrm{2}-}$,$\mathrm{N}{\mathrm{O}}_{\mathrm{2}}^{-},\mathrm{S}{\mathrm{O}}_{\mathrm{3}}^{\mathrm{2}-},\mathrm{S}{\mathrm{O}}_{\mathrm{4}}^{\mathrm{2}-}$) and other environmental factors influence the irradiation effect of torasemide. A higher degradation efficiency was obtained with a lower initial torasemide concentration, higher absorbed dose, and lower pH. The degradation of torasemide was promoted in the presence of $\mathrm{S}{\mathrm{O}}_{\mathrm{4}}^{\mathrm{2}-}$ and low concentrations of H₂O₂, while it was inhibited in the presence of $\mathrm{C}{\mathrm{O}}_{\mathrm{3}}^{\mathrm{2}-}$,$\mathrm{N}{\mathrm{O}}_{\mathrm{2}}^{-},\mathrm{a}\mathrm{n}\mathrm{d}\mathrm{S}{\mathrm{O}}_{\mathrm{3}}^{\mathrm{2}-}$and high concentrations of H₂O₂. Finally, the degradation products were detected by high performance liquid chromatography-quadrupole time of flight mass spectrometer (HPLC-QTOF), and the degradation pathways were deduced.