In the process of designing high frequency surface acoustic wave (SAW) filters, if only the electromagnetic parasitic parameters of the package and the bonding line are considered and the electromagnetic parasitic parameters of the bus bar are ignored, the actual performance of SAW filters will be easily affected by the parasitic parameters of the bus bar, resulting in problems such as large passband ripple and large standing-wave ratio. In this paper, the co-simulation method of the electro-acoustic and electromagnetic is used to design high frequency SAW filter to solve the influence of the parasitic parameters of bus bar on the performance of SAW filter. Based on the proposed method, the filter with the passband insertion loss of less than 1 dB, passband ripple of 0.5 dB, passband standing wave of maximum 2.1,-1.5 dB bandwidth of 75.7 MHz,-3 dB bandwidth of 84 MHz (fractional bandwidth of 4.8%),-30 dB bandwidth of 112 MHz, and the BW-3 dB/ BW-30 dB rectangle factor of 1.33 is developed. The theoretical simulation results of parasitic parameters including the package, bonding wire and bus bar are in good agreement with the experimental test results, indicating the feasibility of using this model to design high-frequency SAW filters.