Abstract：The paper uses staggering grids high-order fi-nite--difference method to study the 5-wave split-ring and second splitting phenomenon in layeredanisotropic media，deduced relative formula of ab-sorption board condition in PIV1I.method that wasapplied to elastic wavefield simulation in anisotrop-is media and achieved good result.;.Snap shot p lot-rings of wavefields and seismographs showed thatfor TIV medium the S-wave splitting phenomenonwould be produced when the polarization directionof S-wave source is at certain angles with symmet-ric axe (but is not 0° or 90°);S-wave splitting phe-nomenon would be always produced for triclinicanisotropic media and fast S-waves are mu ltival-ued;when polarization direction of S-wave source isarbitrary the second splitting phenomenon of trans-mitred and reflected S-waves would be existet inlayered THI media in different orientation，that isfour S-wave components:fast-fast S-wave(qS11qS11),fast-slow S-wave((qS11qS12),slow-fast S-wave (qS12qS11)and slow一、low S-wave (qS12qS12)，meanwhile，the polarization directions of fast-fastS-wave (qS11qS11)and slow-fast S-wave (qS12qS11)are coincident with the fractural direction of frac-tured medium irr last layer and the polarization di-rections of fast一slow S-wave(qS11qS12)find slow-glow S-wave (qS12qS12)are vertical to the fracturaldirection of fractured medium in last layer.
