Taking　the　nickel-based　alloy　GH4169　as　the　research　object,　numerical　simulation　of　short　electric　arc　milling　process　was　carried　out.　A　mathematical　model　of　temperature　field　in　short　electric　arc　milling　of　nickel-based　alloy　GH4169　was　established　by　selecting　suitable　Gaussian　surface　heat　source,　body　heat　source　and　thermal　boundary　conditions,　and　then　the　formation　of　the　molten　pool,　temperature　contour　and　temperature　distribution　were　obtained　in　the　short　electric　arc　milling　process.　According　to　the　temperature　contour,　the　three　regions　(gasification　zone,　melt-solidification　zone　and　heat-affected　zone)　formed　between　the　short　arc　discharge　channel　and　the　matrix　material　were　determined.　The　short　electric　arc　milling　tentative　was　carried　out　with　the　same　process　parameters,　and　the　whole　process　was　monitored　by　infrared　thermal　imager.　The　monitoring　data　was　processed　by　FLIR　R&D　software,　and　the　three-node　thermal　cycle　curve　was　extracted.　The　temperature　trend　coincides　well　with　the　simulations.　The　range　of　each　region　formed　between　the　discharge　channel　and　the　substrate　observed　on　the　temperature　imaging　cloud　map　is　essentially　consistent　with　the　temperature　contour,　which　verifies　the　correctness　of　the　established　model　and　thus　provides　a　theoretical　basis　for　basic　issues　such　as　removal　characteristics,　surface　quality,　and　micro-topography　in　the　short　electric　arc　milling　process.　©　2018,　Editorial　Office　of　Journal　of　Xi＇an　Jiaotong　University.　All　right　reserved.