At　atmospheric　pressure,　diamond-like　carbon　(DLC)　thin　films　were　deposited　on　the　Ti6Al4V　alloy　surface　by　a　DBD　plasma　gun　at　low　temperature　(＜350　degrees　C),　with　CH4　as　a　precursor　and　Ar　as　dilution　gas.　The　structure　of　the　DLC　thin　film　was　analyzed　by　Laser　Raman　spectroscope　and　X-ray　photoelectron　spectroscopy.　The　surface　morphology　was　observed　through　scanning　electron　microscopy.　The　adhesion　between　the　DLC　thin　film　and　the　substrate　was　investigated　with　the　scribe　testing.　The　friction　and　wear　behavior　of　the　DLC　thin　films　under　dry　sliding　against　GCr15　steel　was　evaluated　on　a　ball-on-disc　test　rig.　The　results　show　that　it　is　feasible　to　prepare　a　DLC　thin　film　of　1.0　mu　m　thickness　by　a　plasma　gun.　The　film　is　uniform　and　dense　and　the　surface　roughness　R-a　is　about　13.23　nm.　The　critical　load　of　adhesion　force　between　the　DLC　thin　film　and　the　substrate　is　31.0　N.　It　has　been　found　that　the　DLC　thin　film　has　excellent　friction-　and　wear-resistant　behavior.　The　friction　coefficient　of　the　Ti6Al4V　substrate　is　about　0.50　under　dry　sliding　against　steel,　while　the　DLC　thin　film　experiences　much　abated　friction　coefficient　to　0.15　under　the　same　testing　condition.