put the cart before the horse
US /pʊt ðə kɑrt bɪˈfɔr ðə hɔrs/
UK /pʊt ðə kɑrt bɪˈfɔr ðə hɔrs/

1.
本末倒置, 颠倒顺序
to do things in the wrong order
:
•
You're putting the cart before the horse by buying furniture before you've even found an apartment.
你还没找到公寓就买家具,这是本末倒置。
•
Let's not put the cart before the horse; we need to plan the budget first.
我们不要本末倒置;我们首先需要规划预算。