A　novel　eddy　current-magnetic　track　composite　brake　(EC-MTB)　for　high-speed　trains　is　first　proposed　in　this　paper.　As　a　non-adhesive　braking　device,　the　brake　can　effectively　make　up　for　braking　force　shortage　resulted　by　adhesion　coefficient　decrease　of　a　high-speed　train.　The　brake,　consisting　of　alternating　permanent　magnet　(PM)　braking　sections　and　electromagnetic　braking　sections,　can　work　under　eddy　current　braking　and　magnetic　track　braking　modes.　The　function　of　excitation　can　be　turned　on　and　off　by　rotating　the　upper　PM　in　the　PM　brake.　Alternating　or　isotropic　magnetic　fields　can　be　generated　on　the　rail　by　changing　the　current　direction　in　the　electromagnetic　brake.　The　paper　firstly　introduces　the　structure　and　working　principle　of　the　composite　brake　and　then　investigates　characteristics　of　static　and　transient　magnetic　fields　as　well　as　braking　performance　through　3D　finite　element　simulation　(3D-FEM),　which　proves　that　the　brake　can　lead　to　a　deceleration　of　not　less　than　0.1m/s2　for　a　60T　carriage　in　the　magnetic　track　mode　and　generate　around　IOOON　braking　force　under　the　eddy　current　mode.　©　2022　IEEE.