Submarine　pipelines　are　usually　buried　in　formidable　ocean　environment,　they　are　subjected　to　all　kind　of　environmental　loadings,　in　which　wave　loading　and　seismic　loading　are　the　dominant　loadings.　The　evaluation　of　the　pore　water　pressure　around　a　buried　pipeline　is　particularly　important　for　pipeline　engineers　involved　in　the　design　of　offshore　pipelines.　Most　previous　investigations　of　the　dynamic　response　around　an　offshore　pipeline　have　limited　to　one　single　loading.　In　this　paper,　a　wave　and　seismic　action　together　model　including　buried　pipeline　is　established　based　on　Finite　Element　Method.　Based　on　the　proposed　numerical　model,　the　effects　of　wave　and　seismic　loadings　on　the　excess　pore　pressure　and　displacement　of　seabed　are　examined.　Numerical　results　indicated　that　seismic　loading　action　plays　an　important　role　in　excess　pore　pressure　and　z-displacement　of　the　seabed　while　the　wave　loading　affects　the　excess　pore　pressure　distinctly　and　z-displacement　slightly.　The　seismic-induced　instant　dynamic　response　is　huge　when　earthquake　occurs,　and　it　is　necessary　to　strengthen　defense　measure　to　avoid　the　destruction　under　the　two　loadings　action.　©　2013,　EJGE.