To　provide　a　simple　numerical　formulation　based　on　fixed　grids,　a　wavelet　element　method　for　fluid-solid　modelling　is　introduced　in　this　work.　Compared　with　the　classical　wavelet　finite　element　method,　the　presented　method　can　potentially　handle　more　complex　shapes.　Considering　the　differences　between　the　solid　and　fluid　regions,　a　damping-like　interface　based　on　wavelet　elements　is　designed,　in　order　to　ensure　consistency　between　the　two　parts.　The　inner　regions　are　constructed　with　the　same　wavelet　function　in　space.　In　the　time　and　spatial　domains,　a　partitioned　approach　based　on　Jacobi　iteration　is　combined　with　the　pseudo-parallel　calculation　method.　Numerical　convergence　analyses　show　that　the　method　can　serve　as　an　alternative　choice　for　fluid-solid　coupling　modelling.　©　2020　by　the　authors.