This　paper　describes　the　addition　of　ZnO　nanoparticles　to　epoxy　resin　at　concentrations　of　20,　25,　and　30wt%,　and　the　application　of　this　ZnO/epoxy　coating　to　the　surface　of　an　epoxy　insulator.　This　coating　significantly　suppresses　the　charge　accumulation　on　the　surface　of　the　insulator,　reduces　the　number　of　charge　speckles,　and　increases　the　flashover　voltage.　These　effects　are　enhanced　as　the　doping　concentration　of　ZnO　nanoparticles　increases.　Through　isothermal　surface　potential　decay　tests,　we　find　that　the　ZnO/epoxy　coating　introduces　numerous　shallow　traps,　which　help　to　dissipate　the　surface　charge.　Analysis　shows　that　the　ZnO/epoxy　coating　promotes　surface　charge　dissipation　through　its　nonlinear　conductivity.　The　nonlinear　characteristics　of　the　30wt%-doped　samples　are　55.3%　greater　than　those　of　the　20wt%-doped　samples.　The　coating　adapts　to　the　external　electric　field　and　can　achieve　the　effect　of　a　uniform　electric　field.　This　article　analyzes　the　feasibility　of　using　ZnO/epoxy　coatings　to　suppress　the　accumulation　of　charge　on　insulator　surfaces,　and　provides　a　feasible　solution　for　practical　engineering　applications.　©　1994-2012　IEEE.