伪谱法是一种模拟精度较高的地震波场数值模拟方法。本文以孔隙介质下的Biot流动机制为基础,首先给出了一阶弹性波双相各相同性介质的波动方程,推导其虚谱法的计算方法,并研究了均匀模型和层状模型有耗散全波震源下的波场分离情况。模拟结果表明:双相介质中存在快纵波、横波和慢纵波等三种波,并且可以对有耗散双相介质进行波场分离。 Pseudo-spectral method is a numerical simulation method of seismic wave field with high simulation accuracy. In this paper, based on the Biot flow mechanism in porous media, the wave equation of the first-order elastic wave and diphase homogeneous media is given first, and the calculation method of the virtual spectrum method is deduced. Wave field separation under full-wave source. The simulation results show that there are three kinds of wave, such as fast P-wave, S-wave and slow P-wave, in the two-phase medium, and the wave field can be separated from the dissipative two-phase medium.