将下方宏命令copy到命令窗口中并点击运行即可，也无需保存，即可

（1）设置固定大小n厘米：

Sub resetImgSize()
Dim iShape As InlineShape
For Each iShape In ActiveDocument.InlineShapes
iShape.LockAspectRatio = msoTrue
iShape.Height = CentimetersToPoints(n)
iShape.Width = CentimetersToPoints(n)
Next
End Sub

（2）等比例缩放n倍：

Sub resetImgSize()

Dim imgHeight

Dim imgWidth
Dim iShape As InlineShape
For Each iShape In ActiveDocument.InlineShapes
iShape.LockAspectRatio = msoTrue

imgHeight = iShape.Height

imgWidth = iShape.Width
iShape.Height = CentimetersToPoints(n * imgHeight )
iShape.Width = CentimetersToPoints(n * imgWidth)

Next
End Sub

（3）最大宽度n厘米等比例缩放：

Sub resetImgSize()

Dim imgHeight

Dim imgWidth
Dim iShape As InlineShape
For Each iShape In ActiveDocument.InlineShapes
iShape.LockAspectRatio = msoTrue

imgHeight = iShape.Height
imgWidth = iShape.Width

iShape.Height = CentimetersToPoints(n * imgHeight / imgWidth)
iShape.Width = CentimetersToPoints(n)
Next
End Sub

如果想对同一文件夹下的word进行批量处理 ，可参考下文：