Nonlinear　finite　element　method　was　adopted　to　simulate　numerically　a　rubber-steel　sphere　bush　subjected　to　a　torsion　with　a　circumferential　central　spherical　crack　or　a　circumferential　edge　spherical　crack　in　the　bonded　interface　and　the　middle　rubber　layer.　The　relation　curves　between　tearing　energy　and　crack　depth　were　plotted,　furthermore,　the　relation　curves　between　tearing　energy,　load　and　thickness　of　the　rubber　layer.　The　results　indicate　that　tearing　energy　increases　as　load　increases　but　decreases　as　thickness　of　the　rubber　layer　increases.　And　for　interface　central　crack　and　circumferential　edge　crack　in　the　middle　rubber　layer,　tearing　energy　increases　and　then　decreases　as　crack　depth　increases,　or　interface　circumferential　edge　crack　and　penny　shaped　central　crack　in　the　rubber　layer,　tearing　energy　increases　as　crack　depth　increases.