The coupling-of-modes (COM) model is extensively used in the design of surface acoustic wave(SAW) filters. However, the conventional single-mode COM model is insufficient for accounting for spuriousmodes, such as higher-order horizontal shear waves and Sezawa waves at the far end. In this study, we first usedthe single-mode COM model and integrated it with a resonant branch similar to the MBVD equivalent circuit to establishthe COM-MBVD model for accommodating the multi-modal acoustic response. Subsequently, an 8th-orderladder structure circuit was constructed for optimization simulation, following this model. The final configurationresulted in a SAW filter with a central frequency of 1 590 MHz, a passband insertion loss below 1.6 dB, an in-bandfluctuation of 1 dB, and a bandwidth of 80 MHz (equivalent to a relative bandwidth of 5%). The alignment betweenthe test and simulation data confirms the viability of the design approach.