The　High　Efficiency　Video　Coding　(HEVC)　has　made　great　progress　in　the　compression　efficiency　of　video　coding.　It　achieves　better　performance　and　halves　bitrate　compared　to　H.264　under　the　same　visual　quality.　However,　its　complexity　has　also　been　significantly　increased,　especially　in　intra　prediction.　In　this　paper,　a　fast　intra　prediction　algorithm　based　on　confidence　is　proposed.　Firstly,　this　paper　calculates　the　confidence　of　each　mode,　and　builds　the　2D　vector　based　on　the　confidence　and　angle　of　mode.　Secondly,　the　number　of　mode　candidate　list　is　further　reduced　according　to　the　confidence　of　prediction　mode.　Finally,　it　sets　a　threshold　based　on　the　confidence　to　determine　whether　Coding　Unit　(CU)　partition　terminates　early.　Experimental　results　show　that　the　proposed　algorithm　can　obtain　a　promising　performance　with　a　negligible　impact　on　rate　distortion.　©　2018　IEEE.