A wideband and low-loss SAW filter based on the excited Love wave mode of materials with large electromechanical coupling coefficient of LiNbO3 designed in this paper。The electromechanical coupling coefficient of LiNbO3 materials with different cuts and the Rayleigh wave excitation of 15°YX-LiNbO3 materials with different film thickness and cut were studied, The results show that by using the Cu electrodes to apodize and weight the resonator to suppress the transverse mode, the proposed wideband filter can realize lower insertion loss and better passband characteristics,