To　eliminate　the　easily　formed　micropore　in　the　solidification　structure,　which　severely　deteriorates　the　mechanical　properties　of　high　carbon　Fe-20Mn-3Cu-1.3C　TWIP　steel,　the　effect　of　different　hot　rolling　reduction　at　the　same　deformation　temperature　on　micropore　elimination　and　tensile　mechanical　properties　was　studied.　The　results　indicate　that　hot　rolling　deformation　can　remove　micropore　effectively　and　make　the　microstructure　much　denser.　The　comprehensive　mechanical　properties　are　greatly　enhanced　with　the　increasing　of　hot　rolling　reduction.　When　the　hot　rolling　reduction　comes　to　91%,　the　area　density　of　micropore　in　solution　state　decreases　from　1.67%　to　0.71%,　the　tensile　strength　and　elongation　rate　reaches　1223.7　MPa　and　86.8%,　respectively,　and　the　strength-plasticity　product　achieves　106217.2　MPa·%　which　is　about　78.3%　higher　than　that　of　non-hot　rolled　steel.　This　shows　that　micropore　elimination　is　the　key　factor　to　improve　high　strength　and　toughness　of　Fe-20Mn-3.0Cu-1.3C　TWIP　steel.