Reducing　sediment　is　important　for　the　utilization　and　production　of　green　tea　infusion　and　concentrate.　The　effect　of　tannase　on　sediment　formation　in　green　tea　infusion　and　concentrate　was　investigated.　The　results　showed　that　the　amount　of　sediment　of　green　tea　infusion　significantly　decreased　after　tannase　treatment,　which　was　due　to　the　decrease　in　the　concentration　of　gallated　catechins.　Significant　positive　correlations　between　the　sediment　amount　and　the　gallated　catechin　(r　=　0.980,　p　©　2020,　Springer　Science+Business　Media,　LLC,　part　of　Springer　Nature.