A　novel　type　of　proxy　signature,　multiple　grade　blind　proxy　signature,　is　proposed　for　the　first　time.　It　has　the　properties　of　both　blind　proxy　signature　and　multiple　grade　proxy　signature.　Then　the　multiple　grade　blind　proxy　signature　scheme　is　proposed　based　on　the　intractability　of　the　discrete　logarithm.　The　scheme　not　only　keeps　blind　proxy　for　each　grade,　but　also　minimizes　parameters　from　superior　to　subordinate,　which　improves　the　efficiency.