In　order　to　solve　the　contradiction　between　energy-saving　operation　and　reliability　of　intelligent　electromagnetic　switch,　and　keep　stable　holding　when　the　switch　operating　conditions　change,　this　paper　proposes　an　adaptive　control　strategy　based　on　a　double　closed　loop　control　system:　The　coil　current　is　used　as　inner　loop　feedback　for　energy-saving　operation　control　of　low　current　holding　of　electromagnetic　switch,　the　contact　signal　is　introduced　to　calculate　the　amplitude　and　slope　quickly,　and　feedback　the　contact　state　as　the　outer　loop;　Two　coil　current　control　modes,　normal　and　abnormal,　are　designed.　Normal　control　realizes　energy-saving　operation　of　the　switch,　the　abnormal　control　realizes　the　stable　holding　of　the　switch　under　overload,　short　circuit　and　other　extremely　large　current　levels,　the　outer　loop　feedback　discriminates　the　contact　load　condition,　the　control　mode　of　inner　loop　coil　current　is　judged　based　on　it.　The　ampere-turns　at　core　saturation　is　deduced　by　constructing　equivalent　magnetic　circuit　of　core,　combined　with　strong　excitation　control　and　switching　action　time,　the　coil　current　adjustment　scheme　is　determined　to　achieve　fast　switching　between　the　normal　state　and　the　abnormal　state　control　mode.　Relevant　simulations　and　experiments　verify　the　effectiveness　of　the　control　strategy　and　have　a　universal　significance　for　improving　the　reliability　of　intelligent　electromagnetic　switches.　©　2019　by　International　Academic　Publishers　Ltd.