Since　the　21st　century,　China＇s　carbon　fiber　industry　has　begun　to　develop　rapidly.　The　research　and　development　of　carbon　fiber　is　a　major　project　related　to　national　strategic　security.　Carbon　fiber　production　technology　has　been　mature,　among　which　PAN　based　carbon　fiber　has　the　largest　capacity.　However,　compared　with　the　imported　carbon　fiber　materials,　there　is　still　a　certain　gap　in　the　performance　of　domestic　carbon　fiber　materials.　The　purpose　of　this　paper　is　to　compare　the　properties　of　domestic　carbon　fiber　and　its　composites.　Firstly,　the　production　process　of　carbon　fiber　is　introduced,　including　monomer　polymerization,　spinning,　oiling,　preoxidation,　carbonization,　graphitization　and　other　steps.　Then,　the　T700　Carbon　Fibers　of　Toray,　Japan　and　two　kinds　of　domestic　T700　Carbon　Fibers　of　Hengshen　and　Weihai　were　characterized　and　analyzed,　and　the　surface　morphology　of　three　kinds　of　carbon　fibers　was　compared.　It　is　found　that　the　domestic　carbon　fiber　of　Weihai　adopts　the　similar　technology　of　thousand　spray　wet　spinning,　and　the　fiber　surface　is　smooth.　However,　Hengshen　carbon　fiber　adopts　the　wet　spinning　process.　There　are　grooves　on　the　surface　of　the　fiber,　which　will　increase　the　mechanical　meshing　force　between　the　fiber　and　the　resin,　and　have　a　positive　significance　for　the　interface　performance　of　the　composite.　However,　it　will　increase　the　probability　of　fiber　defects,　such　as　fine　lines,　and　have　a　negative　impact　on　its　tensile　properties　and　other　mechanical　properties.　©　Published　under　licence　by　IOP　Publishing　Ltd.