put the cart before the horse不要理解成马推车，真实意思是本末倒置。

【例句】
What's the rush? Learn to walk before you run. Don't put the cart before the horse.
急什么？先学会走路再学跑步。不要本末倒置。

Yet, this is to put the cart before the horse.
不过，这样说是本末倒置。