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The rutile SnO2nano-crystals adsorbed on the surface of sodium titanate crystal fibers were synthesized by hydrothermal method,using SnCl4·H2O as the precursor by adding titanate crystal fibers and with the pH value of 11,reacting temperature of 180 ℃,reaction time of 24 h,and filling factor of 68%. The SnO2nanocrystals are about 50 nm long and 30～40 nm wide,and many nano-crystals grow with the same orientation in the sodium titanate surface. The characterization results indicate that the belt-like sodium titanate crystal fibers show a strong surface adsorption in strong alkali condition.