The　V(f,　z)　analytical　method　is　an　analytical　method　of　frequency　domain,　and　can　be　applied　to　measure　the　elastic　constants　of　the　smaller-specimen　materials.　Based　on　the　technology　of　acoustic　microscope,　the　line　focus　polyvinylidend　fluoride　(PVDF)　transducer　was　applied　to　measure　the　longitudinal　wave.　The　surface　wave　velocity　could　be　got　by　the　V(f,　z)　analytical　method,　then　the　elastic　constants　were　calculated.　Elastic　constants　of　the　stainless　steel　were　measured,　and　results　were　consistent　with　theoretical　values.　The　error　analysis　shows　that　this　method　has　a　higher　accuracy　and　the　errors　of　Poisson＇s　ratio　and　Young＇s　modulus　is　within　5%,　which　means　that　this　method　can　meet　the　need　of　engineering　and　scientific　research.　Moreover,　this　method　can　be　used　to　measure　the　thin　plate　and　coating　materials,　which　lays　the　foundation　for　further　measuring　the　elastic　constants　of　thin　plate　and　coating　materials.