Terbium gallium gallium(Tb3Ga5O12, TGG) crystals have large Verdet constant, low transmitting loss, high thermal conductivity and high laser damage threshold. It’s the best magnetooptic crystal material for fabricating the Faraday rotators (FRs) for highpower solidstate lasers. An integral, crackfree, spiralfree TGG single crystal with size of 53 mm×80 mm was grown successfully by using the independently developed, automatic, upweighing JGD800 Czochralski(CZ) equipment. A TGG sample with size of 40 mm×30 mm was fabricated for highpower FRs. The visible and near infrared transmission is about 80.6% by the spectrophotometer analysis. The thermal conductivity is 4.566 W/(m·K) at room temperature by the laser thermal conductivity analyzer and decreased with the increase of temperature. Thermal expansion analysis showed that the coefficient of thermal expansion is -2.682 0×10-6 K-1 at temperature of 26.5~200 ℃ and 15.090 4×10-6 K-1 at 200~500 ℃. The Verdet constant is 39.9 rad/(mT) at wave length of 1064nm through the orthogonal extinction method. The optical homogeneity and transmission wave front are 4.3×10-6 and λ/5(λ=632.8 nm) respectively by ZYGO interferometer testing. The laser damage threshold is 3.5 GW/cm2 at the wavelength of 1 064 nm,10 Hz and 9 ns laser. The results indicate that the largesize TGG crystal grown by our method has preferable quality, which have extensively application in the field of highpower solidstate lasers.