主题：关联表如何与主表同步筛选?

 可以看看这个：

http://www.foxtable.com/help/topics/2228.htm

灵活变通一下，就是你的答案，在主表的AfterFilter事件写代码：

If Tables("订单").Rows.Count = 0 Then 
    Tables("订单明细").Filter = "订单ID Is Null"
Else
     Dim ids As String
     For Each dr As Row In Tables("订单").Rows
         ids = ids & ",'" & dr("订单ID") & "'"
     Next
     ids= ids.Trim(",")
     Tables("订单明细").Filter = "订单ID In (" & ids & ")"
 End If