This　paper　presents　a　convenient　structured　light　projection　system　for　microscopic　measurement,　which　is　used　to　design　the　structured-light　pattern　on　the　computer,　you　can　freely　edit　the　pattern　structure,　color,　geometric　size,　motion　mode,　projection　brightness,　contrast　and　other　attributes.　An　optional　path　system　with　zoom　function　is　designed,　which　can　output　10　micron　wide　structured-light　fringe.　The　vision　system　is　established　by　using　camera　and　microscope,　which　is　used　to　shoot　the　pattern　of　structured-light,　and　the　3D　morphology　is　reconstructed　by　analyzing　the　pattern　of　structured-light.　The　experimental　results　show　that　the　system　can　project　small　feature-size　structured-light　patterns　and　is　very　suitable　for　3D　morphology　measurement　of　micro　objects　from　tens　of　microns　to　hundreds　of　microns.