The　response　time　and　action　speed　of　mechanical　switches　have　a　great　impact　on　the　protection　of　low-voltage　DC　systems.　Therefore,　this　paper　takes　eddy　current　repulsive　mechanism　as　the　research　object,　establishes　Maxwell　finite　element　model,　analyzes　the　influence　of　various　structural　parameters　on　the　action　characteristics,　and　builds　a　multi-objective　optimization　model　of　eddy　current　repulsive　mechanism　with　the　shortest　response　time　and　the　fastest　average　speed　as　the　optimization　objectives.　In　view　of　the　strong　nonlinearity　of　the　model,　a　multi-objective　grey　wolf　optimizer(MOGWO)　is　proposed　to　solve　the　model.　The　proposed　optimization　model　demonstrably　enhances　the　performance　of　the　eddy　repulsion　mechanism　of　the　eddy　repulsion　mechanism,　improves　the　optimization　efficiency　and　shorters　the　optimization　period.　©　2025　IEEE.