The paper introduces a method of polarization analysis and its application for seismic signal detection. This method is based on Flinn＇s algorithm in time domain. Calculation of the data polarization characteristics can be done through calculating the eigenstructure of the eovariance matrix in each moving data window. And the polarization filter is designed according to the characteristics of the particle motion to improve the signal to noise ratio （SNR） of the seismic record. Synthetic three-component seismic data and real data from field experiment have been applied and the filtered results show the high efficiency of this method.[著者文摘]