To meet the increasing demand for Q-value and out-of-band suppression in narrowband surface acousticwave 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 experimentaldata are obtained using a two-dimensional full model, which is compared with the original structure resonatorin 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 andrequires little space