Microcompression　tests　revealed　that　a　sequence　of　strain　bursts　occurred　during　plastic　deformation　of　single　crystal　micropillars,　leading　to　obvious　intermittent　plastic　flow　behaviors.　A　stochastic　finite　element　method　was　presented　within　crystal　plasticity　framework　to　describe　the　intermittent　characteristics　of　crystal　deformation　under　the　hybrid　loading　mode　(HLM)　for　both　micron-sized　pillars　and　bulk　crystal.　The　theoretical　model　proposed　recently　was　investigated　by　comparing　the　simulation　results　to　the　experimental　observations　and　the　conventional　finite　element　methods　using　classic　continuum　models　of　plasticity.　The　results　show　that　the　new　model　could　well　capture　the　occurrence　of　the　strain　burst　and　describe　a　smooth　macroscopic　curve　in　the　compression　tests　of　macro-samples.　In　addition,　as　the　diameters　of　micropillar　decrease　to　tens　of　micrometers,　the　model　could　also　reproduce　the　experimentally　observed　micropillars＇　intermittent　plastic　flow　behaviors;　the　plastic　flow　of　the　micropillars　proceeds　through　a　sequence　of　intermittent　burst　slips.