Laser　Raman　spectroscopy　technique　based　on　Raman　scattering　theory　has　the　advantages　of　rapid,　nondestructive,　and　without　sample　pretreatment.　25　samples　of　benzene　with　different　concentrations　are　studied　by　using　laser　Raman　spectroscopy　technique.　The　results　show　that　in　the　184.8　g/L~0.264　g/L　concentration　range,　the　linear　relationship　between　the　intensity　of　Raman　lines　of　benzene　and　its　concentration.　The　linear　correlation　coefficient　of　R=0.99626　is　obtained　by　using　the　least　square　method.　The　detection　limit　is　0.223　g/L.