Inverted-order words are a special category of words in Chinese, which are composed of the same morphemes but in the reverse order. As these words are semantically similar and morphologically alike, they bring considerable trouble to learners of Chinese as a second language in the process of learning, leading to confusion, mistakes, and errors in their expressions. Taking the two words "daiti (代替)"and "tidai (替代)" as examples, this paper makes a comparative analysis of them from two dimensions:rational meaning and usage. Based on the error data related to "daiti(代替)" and "tidai(替代)" collected from the global Chinese Interlingual Corpus, the errors are classified, the causes of the errors are summarized, and finally, effective teaching suggestions are put forward.