A.切换到“工具”选项卡，点击“宏”→“录制宏”，出现“录制新宏”窗口，在“宏名”定义一个名称为：PasswordBreaker，点击“确定”退出

B.再点击“宏”→“查看宏”，选择“宏名”下的“PasswordBreaker”并点击“编辑”，打开“Microsoft Visual Basic”编辑器，用如下内容替换右侧窗口中的所有代码：

Sub PasswordBreaker()
　　Dim i As Integer, j As Integer, k As Integer
　　Dim l As Integer, m As Integer, n As Integer
　　Dim i1 As Integer, i2 As Integer, i3 As Integer
　　Dim i4 As Integer, i5 As Integer, i6 As Integer
　　On Error Resume Next
　　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
　　ActiveSheet.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 ActiveSheet.ProtectContents = False Then
　　MsgBox "One usable password is " & Chr(i) & Chr(j) & _
　　Chr(k) & Chr(l) & Chr(m) & Chr(i1) & Chr(i2) & _
　　Chr(i3) & Chr(i4) & Chr(i5) & Chr(i6) & Chr(n)
　　ActiveWorkbook.Sheets(1).Select
　　Range("a1").FormulaR1C1 = Chr(i) & Chr(j) & _
　　Chr(k) & Chr(l) & Chr(m) & Chr(i1) & Chr(i2) & _
　　Chr(i3) & Chr(i4) & Chr(i5) & Chr(i6) & Chr(n)
　　Exit Sub
　　End If
　　Next: Next: Next: Next: Next: Next
　　Next: Next: Next: Next: Next: Next
　　End Sub

C.再点击“宏”→“查看宏”，选择“宏名”下的“PasswordBreaker”并点击“执行”,稍等密码显现！

D.再点击：“工具”选项卡“保护”点击“撤消工作表保护”，然后输入密码即可解除锁定！

此方法仅供自己忘记密码之时使用，勿用非法破坏！数据无价~