打开密码：
新开一Excel，同时按Alt+F11，进入VBA界面，点菜单上的插入，模块，在新出来的窗口粘贴一下代码：

Sub crack()
Dim i As Long
Dim FileName As String
i = 0
FileName = Application.GetOpenFilename("Excel文件（*.xls & *.xlsx）,*.xls;*.xlsx", , "VBA破解")
FileName = Right(FileName, Len(FileName) - InStrRev(FileName, "\"))
Application.ScreenUpdating = False
line2: On Error GoTo line1
Workbooks.Open FileName, , True, , i
MsgBox "Password is " & i
Exit Sub
line1: i = i + 1
Resume line2
Application.ScreenUpdating = True
End Sub

然后在当前界面，按F5运行此宏，然后选择文件加密需要破解的EXCEL开始进行破解，这个破解速度是看你的密码对的长度、复杂程度、电脑配置。这里测试的密码是 [12] ，秒破。

打开密码破解文章来源：https://blog.csdn.net/qq_22903531/article/details/83410527

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保护密码：
1、先打开有保护密码的Excel文件。
2、新建一个宏（一般都在"视图"页签中）。

3、点击录制宏。

4、点击停止录制。

5、选新建的宏，点编辑。

6、删除所有原内容，替换成框内代码，然后直接关闭VBA窗口，不必保存。

Public Sub Password_cracking()
Const DBLSPACE As String = vbNewLine & vbNewLine
Const HEADER As String = "Password_cracking"
Const VERSION As String = DBLSPACE & "                      Version 1.0"
Const REPBACK As String = DBLSPACE & ""
Const ZHENGLI As String = DBLSPACE & ""
Const ALLCLEAR As String = DBLSPACE & "All password is clear" & DBLSPACE & "Please remember to save" 
Const MSGNOPWORDS1 As String = "No password!"
Const MSGNOPWORDS2 As String = "No password!"
Const MSGTAKETIME As String = "This will take some time , please wait for a while" & DBLSPACE & "Press next to start"
Const MSGPWORDFOUND1 As String = "Password is : " & DBLSPACE & "$$" & DBLSPACE & _
"If the file worksheet has a different password, it will search for the next set of passwords and release"
Const MSGPWORDFOUND2 As String = "Password is : " & DBLSPACE & "$$" & DBLSPACE & _
"If the file worksheet has a different password, it will search for the next set of passwords and release"
Const MSGONLYONE As String = ""
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

7、宏名称会变成“Password_cracking”。

8、选中这个宏，点击执行即可。

保护密码破解原文链接：https://blog.csdn.net/jnxxhzz/article/details/81673107