to mix up someone's mind or ideas, or to make something difficult to understand

You're confusing him! Tell him slowly and one thing at a time. 你把他搞糊涂了！慢慢跟他讲，一次说一件事。

Stop confusing the issue (= making the problem unnecessarily difficult)! 别再把事情越搞越乱！

to mix up two separate things or people in your mind, imagining that they are one

You're confusing me with my sister - she's the singer. 你把我当成我姐姐了——她才是歌手。

It's easy to confuse his films, because he tends to use the same actors. 他的影片很容易混淆，因为他老是用相同的演员。