Abstarct: Processing and designing in various civil engineering particularly in seismic geotechnical projects always has been hard task, Time-consuming and costly endeavor. Development of new methods have always been sought by engineers to reduce calculation time and project cost despite applying advanced and powerful computers and software to deal with complex and huge project however in dynamic analysis still requieres to find ways to decrease the calculating time. Various signals, such as earthquake waves, transfer array of information as they propagate. In this study to reduce data processing period and saving time in modeling and analyzing the seismic geotechnical problems, the accelerogrames were compressed using Wavelet Decomposition Analysis method and reduced the number of data. Then the initial and compressed accelerogrames were implemented on 5 different geotechnical casees. The results revealed that up to 2 level compression of accelerogram data resulted in equales to 75% reduction of data quantities while it caused to 70% of analysing time consuming in computational process along with less than 5% error in achieved results.