Three-dimensional　finite　element　simulation　was　carried　out　for　analyzing　the　severe　plastic　deformation　behavior　during　constrained　groove　pressing.　The　load　variations　and　equivalent　strain　distributions　were　obtained.　The　results　show　that　the　required　load　for　pressing　during　different　passes　is　identical.　The　required　load　for　groove　pressing　varies　with　increasing　the　displacement　can　be　classified　into　three　phases:　rapid　increase,　slowly　increase,　another　rapid　increase.　Whereas　the　required　load　for　flatten　pressing　exhibits　four　phases:　stabilizing,　rapid　increase,　another　stabilizing,　and　another　rapid　increase.　The　equivalent　strain　distributions　are　homogeneous　along　Y　and　Z　axis　but　inhomogeneous　along　X　axis.　It　is　shown　that　the　equivalent　strain　distribution　along　X　axis　can　be　classified　into　the　lower　regions　located　at　both　ends　and　the　periodic　variation　region　located　at　intermediate　section.　The　different　stages　presented　in　the　load　versus　displacement　curves　and　the　inhomogeneous　distributions　of　equivalent　strain　are　associated　with　deformation　behavior.