25　solutions　of　chlorobenzene　in　CCl4　with　different　concentrations　are　studied　by　using　laser　Raman　spectroscopy　technique.　The　results　show　the　linear　relationship　between　the　Raman　spectral　intensity　ratio　of　chlorobenzene　and　CCl4　and　the　concentration　of　chlorobenzene　in　253~0.44　g/L　range.　The　linear　correlation　coefficient　obtained　by　the　least　square　method　is　0.995.　Laser　Raman　spectroscopy　technique　has　the　advantages　of　rapid,　nondestructive　detection　and　no　need　of　sample　pretreatment.　It　is　proved　that　this　spectral　measurement　method　is　feasible　for　low-concentration　detection　and　quantitative　analysis　of　organic　molecules.