Herein,　the　effect　of　Ni-doping　amount　on　microstructure,　magnetic　and　mechanical　properties　of　Fe-based　metallic　microwires　was　systematically　investigated　further　to　reveal　the　influence　mechanism　of　Ni-doping　on　the　microstructure　and　properties　of　metallic　microwires.　Experimental　results　indicate　that　the　rotated-dipping　Fe-based　microwires　structure　is　an　amorphous　and　nanocrystalline　biphasic　structure;　the　wire　surface　is　smooth,　uniform　and　continuous,　without　obvious　macro-　and　micro-defects　that　have　favorable　thermal　stability;　and　moreover,　the　degree　of　wire　structure　order　increases　with　an　increase　in　Ni-doping　amount.　Meanwhile,　FeSiBNi2　microwires　possess　the　better　softly　magnetic　properties　than　the　other　wires　with　different　Ni-doping,　and　their　main　magnetic　performance　indexes　of　M-s,　M-r,　H-c　and　mu(m)　are　174.06　emu/g,　10.82　emu/g,　33.08　Oe　and　0.43,　respectively.　Appropriate　Ni-doping　amount　can　effectively　improve　the　tensile　strength　of　Fe-based　microwires,　and　the　tensile　strength　of　FeSiBNi3　microwires　is　the　largest　of　all,　reaching　2518　MPa.　Weibull　statistical　analysis　also　indicates　that　the　fracture　reliability　of　FeSiBNi2　microwires　is　much　better　and　its　fracture　threshold　value　sigma(u)　is　1488　MPa.　However,　Fe-based　microwires　on　macroscopic　exhibit　the　brittle　fracture　feature,　and　the　angle　of　sideview　fracture　theta　decreases　as　Ni-doping　amount　increases,　which　also　reveals　the　certain　plasticity　due　to　a　certain　amount　of　nanocrystalline　in　the　microwires　structure,　also　including　a　huge　amount　of　shear　bands　in　the　sideview　fracture　and　a　few　molten　drops　in　the　cross-section　fracture.　Therefore,　Ni-doped　Fe-based　metallic　microwires　can　be　used　as　the　functional　integrated　materials　in　practical　engineering　application　as　for　their　unique　magnetic　and　mechanical　performances.