We　propose　a　potentially　practical　scheme　for　preparing　three-dimensional　entanglement　between　a　single　atom　and　an　atomic　ensemble　via　quantum　Zeno　dynamics.　Only　one　step　operation　is　needed　to　obtain　the　three-dimensional　entanglement,　which　reduces　the　complexity　in　experiment.　We　discuss　how　the　parameter　fluctuations　and　the　decoherence　impact　on　the　fidelity　of　the　three-dimensional　entanglement　through　numerical　simulation.　The　numerical　simulations　clearly　demonstrate　that　the　presented　scheme　is　robust　against　the　fluctuations　of　some　experimental　parameters　and　insensitive　to　the　cavity　decay　and　the　fiber　loss.　Within　the　currently　available　technology,　we　also　give　a　discussion　on　the　experimental　feasibility　of　the　proposed　scheme.　(C)　2015　Elsevier　B.V.　All　rights　reserved.