新建一个工作表，命名后保存到和与合并的100个文件同一个文件文件夹，摁 alt + f11,双击工程资源管理器里面的sheet1(sheet1),在右侧的代码区粘贴如下代码。运行。等候一会就OK了。 

Sub 合并当前目录下所有工作簿的全部工作表() 
Dim MyPath, MyName, AWbName 
Dim Wb As Workbook, WbN As String 
Dim G As Long 
Dim Num As Long 
Dim BOX As String 
Application.ScreenUpdating = False 
MyPath = ActiveWorkbook.Path 
MyName = Dir(MyPath & "\" & "*.xls") 
AWbName = ActiveWorkbook.Name 
Num = 0 
Do While MyName <> "" 
If MyName <> AWbName Then 
Set Wb = Workbooks.Open(MyPath & "\" & MyName) 
Num = Num + 1 
With Workbooks(1).ActiveSheet 
.Cells(.Range("A65536").End(xlUp).Row + 2, 1) = Left(MyName, Len(MyName) - 4) 
For G = 1 To Sheets.Count 
Wb.Sheets(G).UsedRange.Copy .Cells(.Range("A65536").End(xlUp).Row + 1, 1) 
Next 
WbN = WbN & Chr(13) & Wb.Name 
Wb.Close False 
End With 
End If 
MyName = Dir 
Loop 
Range("A1").Select 
Application.ScreenUpdating = True 
MsgBox "共合并了" & Num & "个工作薄下的全部工作表。如下：" & Chr(13) & WbN, vbInformation, "提示" 
End Sub