This paper presents the results of a integration algorithm developed to reduce the trend of error that usually appears in the process of acceleration integrating for displacement in engineering test. The integration of acceleration was conducted directly in frequency domain and the integral accuracy is governed by a controlling equation. Experiments were conducted to compare the integration algorithm with previous methods and the result indicates that it is privileged to better control the trend of error. Vibration experiments with impact of limit position were introduced to investigate the characteristics of the integration algorithm. It’s to be noted that the integral trend of error was reduced effectively by the integration algorithm, and it is decreasing with increasing acceleration baseband. The amplitude of integral error is less than 10% while the baseband of the acceleration signal exceeds 3.8Hz and less than 5% corresponds to exceeding 4.35Hz, which could satisfy the engineering requirements more effectively.