A　scheme　is　proposed　for　effective　and　robust　generation　of　magnon　Schr　&　ouml;dinger　cat　states　in　the　hybrid　optomagnonical　system.　The　Schr　&　ouml;dinger　cat　states　can　be　generated　from　the　vacuum　states　and　the　physical　model　is　easy　to　be　implemented.　It　is　worth　noting　that　the　effective　normalized　coupling　strength　of　the　optomagnonical　system　is　able　to　reach　strong　coupling　regime,　which　leads　to　a　fast　evolution　process.　Thus,　the　high　fidelity　and　fast　preparation　of　Schr　&　ouml;dinger　cat　states　can　be　achieved.　Besides,　the　numerical　simulations　show　that　the　scheme　is　robust　against　the　decay　caused　by　environment　and　the　additive　white　Gaussian　noise　(AWGN).　It　is　the　hope　that　the　scheme　may　open　a　new　path　to　the　fast　generation　of　Schr　&　ouml;dinger　cat　states　in　the　hybrid　system.