This paper presents the results of the implementation of a technique for the separation of P and S waves in a multicomponent seismic records in Vertical Seismic Profile data (VSP). Principal Component Analysis (PCA) was conducted like a statistical analysis technique for the selection of this method, as also were implemented techniques in the analysis of signals, the ACP is very important because it can determine the angle of the first arrivals for P and S downward wavefield in VSP data. VSP data were processed and compared with the results in the Seismic Unix software. The method was tested using synthetic and real seismic data.