In this study, twenty-nine coumarin-3-sulfonamide derivatives, twenty-seven of which are original were designed and synthesized. Cytotoxicity assay indicated that most of these derivatives exhibited moderated to good potency against A549 cells. Among them, compound showed potent inhibition against the four tested cancer cell lines, especially A549 cells with IC value of 6.01 ± 0.81 μM, and much lower