A　Fe-based　composite　coating　reinforced　by　in　situ　synthesized　TiC　particles　was　fabricated　on　Cr12MoV　steel　by　using　6KW　fiber　laser　cladding.　A　serial　of　experiment　has　been　carried　out　with　different　laser　power,　scanning　speed,　and　powder　feed　rate,　from　which　TiC　could　be　in　situ　synthesized　only　in　certain　realms　laser　cladding　parameters.　X-ray　diffraction,　scanning　electron　microscopy,　energy　dispersive　spectroscopy,　transmission　electron　microscope　and　a　hardness　tester　are　used　to　test　the　microstructure,　micro-hardness　and　component　distribution.　The　coating　is　mainly　composed　of　alpha;-Fe,　TiC　and　Fe3C.　TiC　particles　were　commonly　precipitated　in　three　kinds　of　morphologies,　such　as　quadrangle,　cluster,　and　flower-like　shape.　The　grains　were　refined,　and　there　were　no　cracks　and　few　stomas.　Defect-free　coating　with　metallurgical　joint　to　the　substrate　was　obtained.　TiC　distributed　more　concentratively　in　the　upper　layers　than　the　middle　and　bottom　layers.　From　the　surface　of　cladding　layer　0.8　mm　the　highest　micro-hardness　was　up　to　HV930,　obviously　higher　than　that　of　the　substrate.