This　paper　summarized　several　severe　plastic　deformation　(SPD)　techniques　used　in　magnesium　alloy　processing　and　analyzed　the　effects　of　different　preparation　processes　on　grain　size,　texture　and　properties　of　magnesium　alloy.　Optimizing　the　present　working　process　and　controlling　appearance　of　texture　to　realize　the　grain　refinement　effect　of　SPD　and　to　improve　properties　of　alloys　are　main　research　keys　in　the　magnesium　alloy　processing.