A　line-focus　PVDF　transducer　for　material　elastic　constant　measurement　of　small　samples　was　developed,　which　aims　at　the　especial　needs　of　testing　mechanical　properties　of　bulk　nano-materials.　This　paper　presents　the　design　and　fabrication　of　the　transducer.　Simulations　for　several　specifications　of　the　transducer　are　carried　out.　This　line-focus　PVDF　transducer　is　a　large　aperture　angle,　wideband,　high-frequency　line-focus　beam　transducer,　and　is　constructed　using　28　μm　thick　piezoelectric　polyvinylidene　fluoride　(PVDF)　film.　An　ultrasonic　measurement　system　was　built,　which　adopts　the　line-focus　PVDF　transducer　and　is　based　on　acoustic　microscope　technology.　Using　this　system,　the　material　elastic　constants　are　determined　by　measuring　the　longitudinal　wave　and　leak　surface　wave　velocities　simultaneously.　Experimental　results　show　that　this　system　works　well　and　can　satisfy　the　requirement　of　engineering　and　scientific　research.　Besides,　the　line-focus　PVDF　transducer　can　launch　surface　acoustic　wave　in　the　specific　direction　perpendicular　to　the　focus　line,　so　it　can　be　further　applied　for　the　study　of　anisotropic　material.