HEVC(High　Efficient　Video　Coding)　becomes　the　hot　area　in　the　world＇s　leading　research　institutions,　since　the　ITU-T/VCEG　and　ISO-IEC/MPEG　two　international　standards　organization　proposed　the　next　generation　video　coding　standard.　The　main　purpose　of　HEVC　is　to　reduce　50%　bit　rate　for　equal　perceptual　video　quality　relative　to　the　existing　standard,　and　service　for　the　HD/ultra　HD　and　3d　video　encoding.　Comparing　the　existing　standard,　this　article　provides　the　overview　of　HEVC,　introduces　the　new　technologies　and　features　about　HEVC　coding　data　structure,　improvement　and　new　technologies　to　the　existing　standard,　and　draws　the　conclusion　about　the　key　technologies　and　future　research　directions　of　HEVC　at　the　end.