Using　sulfur　powder　and　MoO3　powder　as　raw　materials,　the　MoS2　film　was　synthesized　by　chemical　vapor　deposition　method,　and　was　characterized　by　optical　microscopy,　atomic　force　microscopy,　raman　spectroscopy　and　X-ray　diffraction.　Results　show　that　the　crystal　morphology　of　the　MoS2　is　triangle　with　size　of　60　μm　and　thickness　of　0.7　nm;　and　as　one　kind　of　the　ideal　substrates　for　surface-enhanced　Raman　scattering,　two-dimensional　MoS2　can　promote　the　charge　transfer　between　the　organic　molecule　and　MoS2,　so　the　Raman　intensity　of　them　are　enhanced.　The　pentacene　was　adsorbed　onto　the　MoS2　film　by　physical　vapor　deposition　method,　and　the　organic-inorganic　pentacene/MoS2　heterojunction　with　ideal　rectifier　characteristic　was　prepared.　Analysing　the　ln(I/V2)-1/V　curve,　it　is　seen　that　the　Fowler-Nordheim　tunnelling　phenomenon　occured　through　the　heterojunction;　logI-logV　curve　shows　that　charges　transport　controled　by　ohmic　conduction　at　0~1　V　voltages　zone,　and　space-charge-limited　currents　predominate　at　over　1　V　voltages　zone.　The　research　of　MoS2　single-layer　film　and　pentacene　film　will　be　contributed　to　the　optoelectronic　field.　©　2018,　Science　Press.　All　right　reserved.