In　this　paper,　we　describe　a　scheme　for　preparation　of　W　state　among　atomic　ensembles　by　constructing　shortcuts　to　adiabatic　passage　(STAP)　based　on　the　＂Lewis-Riesenfeld　(LR)　invariants＂　in　spatially　separated　cavities　connected　by　optical　fibers.　The　scheme　is　not　only　fast,　but　robust　against　variation　of　the　parameters.　The　influence　of　various　decoherence　processes　on　the　fidelity　is　discussed　as　well.　Numerical　simulations　demonstrate　that　the　fidelity　of　the　three-atomic-ensemble　W　state　is　relatively　high.　Moreover,　the　method　can　be　generalized　to　prepare　W　state　among　any　number　of　atomic　ensembles.