Due　to　the　features　of　the　field　emission　display　(FED),　a　zooming　scheme　based　on　improved　Newton　algorithm　is　proposed　is　this　paper.　The　FED　zooming　system　is　based　on　the　improved　Newton　algorithm,　which　can　effectively　alleviate　the　low　contrast　and　the　low　gray-scale　lost　of　the　FED.　The　final　effect　and　complexity　have　more　obvious　advantages　than　the　traditional　zooming　methods　by　selecting　the　optimal　parameters　and　adding　compensating　coefficients　on　the　basis　of　the　Newton　interpolation　algorithm.　When　applied　to　the　display　of　the　FED,　the　zooming　system　with　the　proposed　algorithm　can　significantly　enhance　the　contrast　and　compensate　the　lost　of　low　gray-scale,　so　that　the　final　image　will　be　more　delicate.