A　time-domain　boundary　element　method　(BEM)　together　with　the　sub-domain　technique　is　applied　to　study　transient　response　of　an　insulating　crack　near　to　the　interface　between　two　anisotropic　piezoelectric　half-planes　under　electromechanical　impacts.　The　present　time-domain　BEM　uses　a　quadrature　formula　for　the　temporal　discretization　to　approximate　the　convolution　integrals　and　a　collocation　method　for　the　spatial　discretization.　Quadratic　quarter-point　elements　are　implemented　at　the　crack　tip.　A　displacement　extrapolation　technique　is　used　to　determine　the　dynamic　stress　intensity　factors　(DSIFs)　and　the　dynamic　electrical　displacement　intensity　factor.　Numerical　examples　are　presented　to　show　the　effects　of　load　combination,　geometric　configuration　and　material　combination　on　dynamic　intensity　factors　and　dynamic　energy　release　rate.　(C)　2012　Elsevier　Ltd.　All　rights　reserved.