ALT F8,打开宏对话框，创建名为SelectAllTables的宏。代码如下： 
Sub SelectAllTables()
Dim tempTable As Table

Application.ScreenUpdating = False

'删除所有可编辑的区域
ActiveDocument.DeleteAllEditableRanges wdEditorEveryone
'添加可编辑区域
For Each tempTable In ActiveDocument.Tables
tempTable.Range.Editors.Add wdEditorEveryone
Next
'选中所有可编辑区域
ActiveDocument.SelectAllEditableRanges wdEditorEveryone
'删除所有可编辑的区域
ActiveDocument.DeleteAllEditableRanges wdEditorEveryone

Application.ScreenUpdating = True

End Sub