In this article,we analyze the continuous seismic waveform data from 9 fixed seismic stations in the region where the epicenter of the 2008 Wenchuan M8.0 earthquake occurred,combining with the remote event waveform data recorded by the China Seismological Array in the epicentral region. At the same time,the P-wave and its coda of the remote event waveform are used to detect the underground structure information of some stations in the epicentral region. we attempt to make a structural interpretation of some seismic stations in the epicentral region. The results show that:① The low-frequency signals of seismic waves extracted from 9 fixed seismic stations appeared the abnormal pattern of first rise and then fall,which lasted about 40 hours from April 17,2008 to April 19,2008,at the same time,it is accompanied by intermittent sudden jumps and present densely after the earthquake. ② The deformation of the lithospheric structure at different time intervals was observed from the survey line data near the earthquake epicenter,and the underground structure of the station located on the seismogenic fault changes more obviously than that on the non-seismogenic fault. The deformation phenomena of the lithosphere structure near the epicentral line are obtained by using the data of the same frequency band(0～5Hz)as that of the low frequency abnormal signal,which reflects that the low frequency abnormal signal recorded in the seismic continuous waveform is closely related to the deformation of the lithosphere in the focal area.