在层状均匀介质理论基础上 ,对瞬态瑞雷波相速度的求法进行了研究。提出了对信号进行预先调制 ,之后再对所求得的相位进行修正的方法 ;通过现场试验总结出了三种类型信号模板。另外对于所使用的仪器必须考虑其采集信号时的时间差影响等 Based on the theory of layered homogeneous media, the phase velocity of transient Rayleigh wave is studied. A method of pre-modulating the signal and then correcting the obtained phase is proposed. Three kinds of signal templates are summarized through field experiments. In addition for the use of the instrument must take into account the timing of the signal acquisition time and other effects