“在X上”与“在X里”是对外汉语教学中必然遇到的问题,而且是中高级学生面临的一个看似简单,但运用起来无头绪的语法点。但是现在对外汉语教学所涉猎的教材中并没有一本教材专门讲解过着两者的区别。本文从“上”和“里”的词义、两种格式的区别进行分析,并提出几点教学的建议。 “On X ” and “In X ” is an inevitable problem in teaching Chinese as a foreign language, but also a seemingly simple, but useless, grammar point for middle and high school students. However, there is not a textbook devoted to teaching Chinese as a foreign language to explain the difference between the two. This article analyzes the differences between the two forms from the meanings of “Shang ” and “Li ”, and puts forward some suggestions for teaching.