Sub DocumentSplitter()
    Dim xDoc As Document, xNewDoc As Document
    Dim xSplit As String, xCount As Long, xLast As Long
    Dim xRngSplit As Range, xDocName As String, xFileExt As String
    Dim xRegEx As RegExp
    Dim xPageCount As Integer
    Dim xShell As Object, xFolder As Object, xFolderItem As Object
    Dim xFilePath As String
    On Error Resume Next
    Set xDoc = Application.ActiveDocument
    Set xShell = CreateObject("Shell.Application")
    Set xFolder = xShell.BrowseforFolder(0, "Select a Folder:", 0, 0)
    If TypeName(xFolder) = "Nothing" Then Exit Sub
    Set xFolderItem = xFolder.Self
    xFilePath = xFolderItem.Path & "\"
    Application.ScreenUpdating = False
    Set xNewDoc = Documents.Add(Visible:=False)
    xDoc.Content.WholeStory
    xDoc.Content.Copy
    xNewDoc.Content.PasteAndFormat wdFormatOriginalFormatting
    With xNewDoc
        xPageCount = .ActiveWindow.Panes(1).Pages.Count
L1:     xSplit = InputBox("The document contains " & xPageCount & " pages." & _
                 vbCrLf & vbCrLf & " Please enter the page count you want to split:", "Kutools for Word", xSplit)
        If Len(Trim(xSplit)) = 0 Then Exit Sub
        Set xRegEx = New RegExp
        With xRegEx
            .MultiLine = False
            .Global = True
            .IgnoreCase = True
            .Pattern = "[^0-9]"
        End With
        If xRegEx.Test(xSplit) = True Then
            MsgBox "Please enter the page number:", vbInformation, "Kutools for Word"
            Exit Sub
        End If
        If VBA.Int(xSplit) >= xPageCount Then
            MsgBox "The number is greater than the document number." & vbCrLf & "Please re-enter", vbInformation, "Kutools for Word"
            GoTo L1
        End If
        xDocName = xDoc.Name
        xFileExt = VBA.Right(xDocName, Len(xDocName) - InStrRev(xDocName, ".") + 1)
        xDocName = Left(xDocName, InStrRev(xDocName, ".") - 1) & "_"
        xFilePath = xFilePath & xDocName
        For xCount = 0 To Int(xPageCount / xSplit)
            xPageCount = .ActiveWindow.Panes(1).Pages.Count
            If xPageCount > xSplit Then
                xLast = xSplit
            Else
                xLast = xPageCount
            End If
            Set xRngSplit = .GoTo(What:=wdGoToPage, Name:=xLast)
            Set xRngSplit = xRngSplit.GoTo(What:=wdGoToBookmark, Name:="\page")
            xRngSplit.Start = .Range.Start
            xRngSplit.Cut
            Documents.Add
            Selection.Paste
            ActiveDocument.SaveAs FileName:=xFilePath & xCount + 1 & xFileExt, AddToRecentFiles:=False
            ActiveWindow.Close
        Next xCount
        Set xRngSplit = Nothing
        xNewDoc.Close wdDoNotSaveChanges
        Set xNewDoc = Nothing
    End With
    Application.ScreenUpdating = True
End Sub