Two magneto optic single crystal garnets Bi HoYbIG and BiGd:YIG with high Faraday rotation and low temperature sensibility were growth from high temperature flux. Magneto optic properties in ear infrared range of these two crystals were measured. Magneto optic crystal garnet Ho3xy Yby Bix Fe5O12(x=1.03, y=1.20) has the specific Faraday rotation θF of -891°/cm (λ=1.31 μm) and -767°/cm (λ=1.55 μm), and Y 3 x y Gd y Bi x Fe 5 O 12 (x=0.46, y=0.24) has -1067°/cm (λ=1.31 μm) and -882°/cm (λ=1.55 μm), both are much higher than pure YIG′s. Their Faraday rotations have low temperature dependence also, the temperature sensibilities are 4.60×10 -4 K -1 of Bi HoYbIG and 4.20×10 -4 K -1 of BiGd:YIG among 250～400 K. The results indicated that doped with Bi 3+ can enlarged Faraday rotation greatly, and dodoped with Yb 3+ and Gd 3+ can effetely reduce Faraday rotation temperature sensib