bang/knock your/their heads together

强行制止人们争吵并使之恢复理智

to force people to stop arguing and behave in a sensible way;

例如：

It is now high time he banged his colleagues' heads together.

现在该是他敲打敲打同事们的时候了。《柯林斯高阶英汉双解学习词典》

If you two boys don't stop quarrelling immediately, I 'll bang your heads together.

如果你们两个男孩不马上停止争吵，我就要使用武力制止 你们的争吵了。

If you two do something this stupid again, I'm going to knock your heads together!

如果你们俩再做这么愚蠢的事，我就要强行制止人们争吵并使之恢复理智。

If he's unable to knock everybody's heads together, then questions are going to be raised about his own ability to continue in office.

如果他不能强行制止人们争吵并使之恢复理智，那么人们就会质疑他自己继续执政的能力。