Abstract: In analytic languages like Chinese, the issue of word classes has become a “Goldbach Conjecture”, and word class labeling has become a major concern in Chinese and Chinese-foreign language dictionaries. Concise Chinese-German Dictionary is the first Chinese-German dictionaries trying to label its entries with word classes. This paper is intended to make an in-depth study of the word class view based on the Preface, User's Guide as well as the word class labeling practice in the dictionary, focusing on the selection of word class systems, the criteria and procedures of word class identification, the labeling objects, and the implementation of the Principle of Translating by POS. It is found that there are both achievements and problems in the word class labeling of the dictionary, that the difficulties faced by the compilers to a great extent reflects the true picture of the difficult situation in the word class study of Modern Chinese, and that the existence of multi-category words in German can shed some light on Chinese word classes.