This　paper　sets　up　a　rumor　spreading　model　in　online　social　networks　based　on　the　European　fox　rabies　SIR　model.　The　model　considers　the　impact　of　changing　number　of　online　social　network　users,　combines　the　transmission　dynamics　to　set　up　a　population　dynamics　of　rumor　spreading　model　in　online　social　networks.　Simulation　is　carried　out　on　online　social　network,　and　results　show　that　the　new　rumor　spreading　model　is　in　accordance　with　the　real　propagation　characteristics　in　online　social　networks.　(C)　2017　Elsevier　B.V.　All　rights　reserved.