In　this　paper,　we　propose　a　modified　extra-gradient　method　(MEGM)　for　solving　quadratic　optimization.　In　the　MEGM　method,　we　use　a　matrix　parameter　Gk　to　balance　the　primal　and　dual　variables.　Numerical　results　show　that　the　MEGM　method　significantly　improves　both　computational　cost　and　iteration　number　compared　to　the　classical　extra-gradient　method.　©　2012　IEEE.