The lithium tantalate (LiTaO3) single crystals have excellent piezoelectric properties and are widely used as substrate material for SAW filters. In this work, an 4 inch, 42° rotated Y cut, integral, crack-free LiTaO3 single crystal was successfully grown using the in-house developed Czochralski (CZ) furnace. The transmittance is close to 80% by the visible and near infrared spectrophotometer test, its full width at half maximum (FWHM) is 28.4″ by X-ray rocking test, which show that the grown crystal has good single crystal property. The Curie temperature of the head and tail of the grown crystal is measured by the differential thermal analyzer, and the Curie temperature deviation is 4.4 ℃. The results of SAW performance test show that the SAW velocity, electromechanical coupling coefficient and frequency temperature coefficient of LiTaO3 single crystal meet the requirements of SAW filter.