分门别类

fēn mén bié lèi

to sort into categories; to classify systematically

Character by character

分fēn
divide

门mén
category

别bié
separate

类lèi
kind

她把药箱里的药分门别类，过期的都挑出来扔了。

She sorted the medicine box by type and threw out everything past its date.

Tone: neutral.

门 and 类 both mean “category”. Usually an adverbial: 分门别类地整理／存放／介绍. Neutral to slightly formal.

Learn this in Lesson 12 · HSK 5: 小区生活与垃圾分类 (Life in the compound, and sorting the rubbish)

A dialogue, a reading, word cards with audio and a drill that uses it, in Learn Chinese with Bao. The first lessons of every level are free.