The　growth　and　spectral　properties　of　Er3+/Yb3+:　Sr3Y2(BO3)4　crystal　were　reported　in　this　paper.　Er3+/Yb3+:　Sr3Y2(BO3)4　crystal　with　high　quality　and　dimensions　of　φ25　mm35　mm　has　been　grown　by　the　Czochralski　method.　The　spectral　properties　of　Er3+/Yb3+:　Sr3Y2(BO3)4　were　investigated.　Based　on　the　Judd-Ofelt　(J-O)　theory,　the　spectral　parameters　were　calculated.　The　oscillator　intensity　parameters　were　Ω2=14.1010-20　cm2,　Ω4=1.6910-20　cm2,　Ω6=1.7210-20　cm2,　and　the　emission　cross　section　was　8.2410-21　cm2　at　1534　nm.　The　fluorescence　lifetime　and　radiative　lifetime　of　the　Er3+　(4I13/2→4I15/2　transition)　were　0.650　ms　and　3.873　ms,　respectively.　The　result　shows　that　the　Er3+/Yb3+:　Sr3Y2(BO3)4　crystal　may　be　become　1.55　μm　laser　materials.