To meet the increasing demand for Q-value and out-of-band suppression in narrowband surface acoustic wave filters, this paper proposes a design method based on a new type of piezo on insulator (POI) structure resonator.The purpose of changing the wave propagation angle is achieved by rotating the resonator, and accurate experimental data are obtained using a two-dimensional full model, which is compared with the original structure resonator in the filter design. The experimental results show that this method can effectively increase out-of-band suppression, with a 2-4 dB improvement in transition band suppression ability. Additionally, the design is simple and requires little space