The design method of fan-shaped SAW filter using leaky wave propagating on LiTaO3 substrates is proposed in this paper. The electromechanical coupling coefficient (ΔV/V) of 36°Y-X LiTaO3 substrates is 2.4%, and the temperature coefficient of frequency (TCF) is -32×10-6/℃. The 36°Y-X LiTaO3 has strong piezoelectric coupling characteristic and moderate temperature stability, based on it, the designed SAW filter with 5%~10% fractional bandwidth can achieve less insertion loss and moderate temperature stability. The measured results of fabricated device are consistent with the simulated ones.