In　order　to　analyze　the　effect　of　heating　method　on　the　orange　peel　effect,　hot　air　heating　system　and　carbon　fiber　electric　pipe　heating　system　were　developed　in　the　warm　incremental　forming　process　respectively.　An　octagonal　pyramid　was　designed　as　the　forming　target　and　a　series　of　forming　experiments　at　different　temperatures　were　conducted.　The　microstructures　characterizations　of　the　magnesium　parts　were　also　performed.　The　effects　of　forming　temperature　and　heating　method　on　the　microstructure　of　magnesium　parts　were　deeply　discussed,　and　the　cause　of　the　orange　peel　was　analyzed.　The　results　show　that　the　orange　peel　is　strongly　affected　by　the　forming　temperature　and　heating　method.　The　surface　quality　of　parts　formed　by　hot　air　heating　system　is　generally　better　than　that　of　carbon　fiber　electric　pipes　system.　©　2021,　Central　South　University　Press.　All　right　reserved.