To　improve　the　operation　stability　and　reliability　and　reduce　the　structural　weight,　the　flexural　properties　of　tape　spring　made　of　laminated　composite　material　were　studied.　The　mechanical　properties　including　driving　ability　and　self-locking　ability　of　tape　spring　represented　strain　energy,　steady　moment　and　represented　buckling　critical　moment　were　investigated.　The　influences　of　composite　ply　angle,　layer　thickness　and　radius　of　cross　section　of　tape　spring　on　mechanical　properties　were　researched　in　the　bending　and　folding　process.　Results　show　that　the　driving　ability　of　tape　spring　increases　with　self-locking　ability　steady　as　the　composite　ply　angle　grows;　the　composite　ply　angle　and　radius　of　cross　section　lead　to　improvement　of　driving　and　self-locking　ability;　and　the　phenomena　of　deformation　of　cross　section　and　of　minute　rebound　has　risen　due　to　growth　of　composite　ply　angle　and　radius　of　cross　section.　This　research　has　important　reference　value　for　improving　the　driving　performance　of　space　tape-spring　hinge.　©　2017,　Editorial　Department　of　Journal　of　Beijing　University　of　Technology.　All　right　reserved.