In　this　paper,　we　address　the　Holder　regularity　for　helicity　for　incompressible　flows.　It　is　shown　that　the　helicity　of　incompressible　Euler　equations　belongs　to　Holder　spaces　provided　that　the　velocity　or　vorticity　lies　in　suitable　Besov　spaces,　which　generalizes　recent　results　in　Sobolev　spaces　due　to　De　Rosa　(Proc　Am　Math　Soc　148:　2969-2979,　2020).　The　analogue　result　for　the　incompressible　fractional　Navier-Stokes　equations　is　also　derived.