Magnetic　storage　medium　such　as　hard　disk　is　the　main　carrier　of　electronic　information　at　present.　How　to　completely　remove　the　data　information　on　storage　medium　such　as　used　hard　disk　and　prevent　information　leakage　is　a　very　important　problem　in　the　field　of　information　security　research.　Based　on　the　current　research　status　of　magnetic　storage　media　degaussing　technology,　this　article　analyzes　and　summarizes　the　composition　of　degaussing　equipment,　degaussing　process　and　each　module　of　degaussing　equipment.　Then　the　article　summarizes　the　research　difficulties　of　magnetic　storage　media　degaussing　technology.　Finally　the　article　points　out　the　possible　future　of　magnetic　storage　media　degaussing　technology　research　direction.