The　measurement　mode　of　existing　optical　voltage　sensor　is　mostly　based　on　optical　power　detection,　so　its　measurement　range　and　sensitivity　are　limited　by　the　half-wave　voltage　of　electro-optic　crystal.　The　multi-segmented　Pockels　sensor　can　fix　the　problem　of　limitation　of　the　half-wave　voltage,　but　only　for　1　000　kV　voltage　level.　In　addition,　from　the　simulations　the　electric　field　distribution　in　the　crystal　is　un-uniform　and　the　optical　path　and　crystal　slices　are　deviated　easily　by　vibration　and　thermal　expansion　and　contraction　in　this　configuration,　which　results　in　measurement　error.　Therefore,　the　multi-segmented　structure　is　improved　at　110　kV　voltage　level.　The　sensing　system　is　simplified　and　the　MgTiO3　ceramic　is　used　to　wrap　around　the　crystal　to　improve　the　electric　field　distribution　in　the　crystal,　so　that　the　error　reduces　from　0.275%　to　0.01%　or　less.　The　improved　structure　is　applicable　to　various　voltage　levels.　Finally,　the　validity　of　the　proposed　method　is　verified　by　the　experiment.　©　2018　Automation　of　Electric　Power　Systems　Press.