The　influence　of　direct　current　(DC)　electric　field　on　the　thickness　and　mass　of　frost　on　a　cold　vertical　plate　was　investigated.　The　photos　of　frost　layer　growth　were　taken　with　and　without　the　presence　of　electric　field,　and　results　showed　that　the　electric　field　has　a　strong　influence　on　the　frost　thickness.　The　influences　of　cold　plate　temperature　and　ambient　temperature　on　frost　thickness　and　frost　mass　were　also　investigated　under　the　natural　convection　condition　with　electric　field.　Experimental　results　demonstrated　that　the　cold　plate　temperature　has　very　strong　effect　on　the　frost　layer　thickness,　but　its　influence　on　frost　mass　is　minor;　the　influence　of　ambient　temperature　on　the　frost　mass　is　more　obvious　than　that　on　the　frost　thickness.