离合词是汉语词汇中一类比较特殊的词语，其所具有的可“离”可“合”的特殊性质，使它身跨“词汇教学”和“语法教学”两个范畴。 在目前的对外汉语教学中，离合词还没有得到应有的重视。现在的对外汉语教学大纲和各类汉语教材对离合词的特点大多是轻描淡写地处理甚至避而不谈，教学中对离合词的用法的讲析和训练也很不充分，以致离合词成为对外汉语词汇教学中的一个薄弱环节。 本文借鉴汉语离合词研究和对外汉语离合词教学已有的研究成果，以外国留学生为调查对象，运用相关的语言学理论、语言教学理论和语言学习理论，采用计量语言学的研究方法 ，在对《汉语教程》和《汉语水平词汇与汉字等级大纲》中的离合词进行统计分析，考察初、中、高三个不同学习阶段的留学生在汉语离合词习得过程中的偏误类型和偏误原因，探讨造成离合词教学“教师难教、学生难学”的主要原因，并据此提出改善离合词教学的相关对策和方法，以期为对外汉语离合词教学提供某些理论和现实的依据。

The Split Words are kind of special ones in Chinese vocabularies and their special nature---sometimes they can combine into one word and sometimes also can separate into two words when they are used in our daily life, which makes them belong to two categories----“The Vocabulary Teaching” and “The Grammar Teaching”. However, at present, in the Teaching Chinese as a Foreign Language (TCFL), the Split Words haven’t been attached much more importance. Their characters mostly are treated in the understatement or even neglected by the existing teaching outlines and all kinds of teaching materials about TCFL,and what is more, the explanations and the excises on the Split Words during the class are still not enough as what they ask for. As a result, they become a weak link in the TCFL. The paper uses the exiting achievements concerning the research and the teaching of the Split Words for reference, taking the foreign students as the investigated objects, applying the relevant linguistic theories、the teaching and learning theories, at the same time adopting the methods of Measurement of Linguistics, basing on the statistics and analysis of Split Words and then make an investigation towards the foreign students who are respectively in primary, intermediate and advanced classes, inspecting the types of the errs they make and reasons why they do, inquiring the main reasons why "the teachers feel hard to teach and the students feel hard to learn" in the Split Words teaching, accordingly put forward the relevant countermeasures in order to improve the teaching of the Split Words, which is aiming at providing some theoretical and realistic basis to the Split Words Teaching in TCFL.