In　this　experiment,　zinc　oxide/crosslinked　polyethylene　composites　were　prepared　by　adding　zinc　oxide　particles　with　nonlinear　conductivity　characteristics.　By　controlling　the　content　of　zinc　oxide,　the　microstructure　of　the　composite　material　was　observed　and　the　conductivity　of　the　composite　was　measured.　The　aim　of　this　research　is　to　find　the　optimum　content　of　zinc　oxide　in　composites　with　optimal　nonlinear　conductance　properties.　The　results　show　that　when　the　content　of　zinc　oxide　is　fifteen　percent,　the　composite　material　has　the　best　characteristics　of　nonlinear　conductivity.　This　non-linear　composite　material　can　homogenize　the　field　strength　by　itself,　suppress　the　generation　of　electricity　tree,　prevent　the　material　from　aging,　and　has　a　very　important　application　in　the　power　system.