Single　MoSi2　cladding　is　prepared　by　CO2　laser　with　a　spot　diameter　of　about　3　mm.　The　main　phase　of　long　dendrite　in　the　cladding　layer　is　(Fe,　Si)2Mo,　as　revealed　by　X-ray　diffraction　(XRD)　and　scanning　electron　microscope　(SEM)　detection.　The　interdendritic　phase　is　mainly　α-Fe　and　Fe2Si.　Micro-hardness　of　the　coating　is　maintained　at　about　700　HV.　The　spot　is　shaped　to　a　rectangle　with　the　size　of　2　mm×6　mm,　and　the　cladding　of　Ni/MoSi2　mixed　powder　is　then　performed.　It　is　found　that　as　the　Ni-based　alloy　increases,　the　cracks　are　significantly　reduced,　and　the　critical　mass　ratio　of　Ni　and　MoSi2　is　3:7.　By　calculating　thermal　stress　and　dilution　ratio,　it　is　proved　that　broadband　laser　cladding　can　be　appropriate　to　reduce　the　thermal　tensile　stress　and　dilution　rate.　Finally,　XRD　and　energy　dispersive　spectrometry　(EDS)　are　used　to　detect　the　Ni/MoSi2　cladding　and　the　main　phases　of　high　Mo　dendrite　are　found　to　be　MoSi2　and　NiMo.　The　average　micro-hardness　is　750　HV　and　the　maximum　microhardness　is　861.9　HV,　present　in　the　dendrite　of　coating,　achieving　the　purpose　of　improving　substrate　physical　properties.