1、打開您需要撤銷保護密碼的Excel文件；
2、依次點擊菜單欄上的工具---宏----錄制新宏，輸入宏名字如:ab；
3、停止錄制(這樣得到一個空宏)；
4、依次點擊菜單欄上的工具---宏----宏,選ab,點編輯按鈕；
5、刪除窗口中的所有字符(只有幾個),替換為以下內容；
Public Sub 工作表保護密碼()
Const DBLSPACE As String = vbNewLine & vbNewLine
Const AUTHORS As String = DBLSPACE & vbNewLine & _
"作者:eric"
Const HEADER As String = "工作表保護密碼"
Const VERSION As String = DBLSPACE & "版本 Version 1.1.1"
Const REPBACK As String = DBLSPACE & ""
Const ZHENGLI As String = DBLSPACE & " eric"
Const ALLCLEAR As String = DBLSPACE & "該工作簿中的工作表密碼保護已全部解除。" & DBLSPACE & "請記得重新設置密碼" _
& DBLSPACE & "注意：此方法僅用於遺忘密碼使用。"
Const MSGNOPWORDS1 As String = "該文件工作表中沒有加密"
Const MSGNOPWORDS2 As String = "該文件工作表中沒有加密2"
Const MSGTAKETIME As String = "請耐心等候!" & DBLSPACE & "按確定開始回復"
Const MSGPWORDFOUND1 As String = "密碼重新組合為:" & DBLSPACE & "$$" & DBLSPACE & _
"如果該文件工作表有不同密碼,將搜索下一組密碼並修改清除"
Const MSGPWORDFOUND2 As String = "密碼重新組合為:" & DBLSPACE & "$$" & DBLSPACE & _
"如果該文件工作表有不同密碼,將搜索下一組密碼並解除"
Const MSGONLYONE As String = "確保為唯一的?"
Dim w1 As Worksheet, w2 As Worksheet
Dim i As Integer, j As Integer, k As Integer, l As Integer
Dim m As Integer, n As Integer, i1 As Integer, i2 As Integer
Dim i3 As Integer, i4 As Integer, i5 As Integer, i6 As Integer
Dim PWord1 As String
Dim ShTag As Boolean, WinTag As Boolean
Application.ScreenUpdating = False
With ActiveWorkbook
WinTag = .ProtectStructure Or .ProtectWindows
End With
ShTag = False
For Each w1 In Worksheets
ShTag = ShTag Or w1.ProtectContents
Next w1
If Not ShTag And Not WinTag Then
MsgBox MSGNOPWORDS1, vbInformation, HEADER
Exit Sub
End If
MsgBox MSGTAKETIME, vbInformation, HEADER
If Not WinTag Then
Else
On Error Resume Next
Do 'dummy do loop
For i = 65 To 66: For j = 65 To 66: For k = 65 To 66
For l = 65 To 66: For m = 65 To 66: For i1 = 65 To 66
For i2 = 65 To 66: For i3 = 65 To 66: For i4 = 65 To 66
For i5 = 65 To 66: For i6 = 65 To 66: For n = 32 To 126
With ActiveWorkbook
.Unprotect Chr(i) & Chr(j) & Chr(k) & _
Chr(l) & Chr(m) & Chr(i1) & Chr(i2) & _
Chr(i3) & Chr(i4) & Chr(i5) & Chr(i6) & Chr(n)
If .ProtectStructure = False And _
.ProtectWindows = False Then
PWord1 = Chr(i) & Chr(j) & Chr(k) & Chr(l) & _
Chr(m) & Chr(i1) & Chr(i2) & Chr(i3) & _
Chr(i4) & Chr(i5) & Chr(i6) & Chr(n)
MsgBox Application.Substitute(MSGPWORDFOUND1, _
"$$", PWord1), vbInformation, HEADER
Exit Do 'Bypass all for...nexts
End If
End With
Next: Next: Next: Next: Next: Next
Next: Next: Next: Next: Next: Next
Loop Until True
On Error GoTo 0
End If
If WinTag And Not ShTag Then
MsgBox MSGONLYONE, vbInformation, HEADER
Exit Sub
End If
On Error Resume Next
For Each w1 In Worksheets
'Attempt clearance with PWord1
w1.Unprotect PWord1
Next w1
On Error GoTo 0
ShTag = False
For Each w1 In Worksheets
'Checks for all clear ShTag triggered to 1 if not.
ShTag = ShTag Or w1.ProtectContents
Next w1
If ShTag Then
For Each w1 In Worksheets
With w1
If .ProtectContents Then
On Error Resume Next
Do 'Dummy do loop
For i = 65 To 66: For j = 65 To 66: For k = 65 To 66
For l = 65 To 66: For m = 65 To 66: For i1 = 65 To 66
For i2 = 65 To 66: For i3 = 65 To 66: For i4 = 65 To 66
For i5 = 65 To 66: For i6 = 65 To 66: For n = 32 To 126
.Unprotect Chr(i) & Chr(j) & Chr(k) & _
Chr(l) & Chr(m) & Chr(i1) & Chr(i2) & Chr(i3) & _
Chr(i4) & Chr(i5) & Chr(i6) & Chr(n)
If Not .ProtectContents Then
PWord1 = Chr(i) & Chr(j) & Chr(k) & Chr(l) & _
Chr(m) & Chr(i1) & Chr(i2) & Chr(i3) & _
Chr(i4) & Chr(i5) & Chr(i6) & Chr(n)
MsgBox Application.Substitute(MSGPWORDFOUND2, _
"$$", PWord1), vbInformation, HEADER
'leverage finding Pword by trying on other sheets
For Each w2 In Worksheets
w2.Unprotect PWord1
Next w2
Exit Do 'Bypass all for...nexts
End If
Next: Next: Next: Next: Next: Next
Next: Next: Next: Next: Next: Next
Loop Until True
On Error GoTo 0
End If
End With
Next w1
End If
MsgBox ALLCLEAR & AUTHORS & VERSION & REPBACK & ZHENGLI, vbInformation, HEADER
End Sub
6、關閉編輯窗口；
7、依次點擊菜單欄上的工具---宏-----宏,選AllInternalPasswords,運行,確定兩次，等候一兩分鍾,會出現以下對話框：
這是Excel密碼對應的原始密碼(此密碼和之前設置的密碼均能打開此文檔。