Bi-doped　rare　earth　iron　garnet　(Bi:RIG)　crystal　is　an　ideal　magneto-optical　material　for　optical　isolators　in　the　near-infrared　band,　which　has　been　widely　used　in　optical　communication　applications.　In　this　paper,　centimetersized　and　good-quality　Ni2+-doped　Bi:RIG　crystals　were　successfully　grown　by　top-seeded　solution　growth　(TSSG).　The　transmittance　reaches　72.6%　at　1550　nm,　which　is　higher　than　commercial　Bi:TbIG　crystal　and　close　to　the　theoretical　values　of　RIG　crystals.　Doping　Ni　can　not　only　greatly　improve　the　transmittance,　magnetic,　and　magneto-optical　properties,　but　also　decrease　the　Faraday　rotation　temperature　(FTC)　and　wavelength　coefficients　(FWC)　of　the　Bi:RIG　crystal.　The　FTC　and　FWC　of　(Bi0.37Ho1.18Eu0.83Gd0.62)(Fe4.20Ni0.25Ga0.55)O-12　crystal　reduced　to　-　6.3　x　10(-4)　K-1　and　8.0　x　10(-4)　nm(-1),　which　are　about　30%　and　80%　of　commercial　Bi:TbIG　crystal,　respectively.　(Bi0.37Ho1.18Eu0.83Gd0.62)(Fe4.20Ni0.25Ga0.55)O-12　exhibits　potential　for　utilization　in　new　high　-performance,　wideband　magneto-optical　isolators,　and　is　expected　to　find　application　in　the　field　of　wavelength　division　multiplexing　fiber　communication.