Abstract
The deepening of cultural exchange, various language appeared on the international stage, including German, English, French, Chinese, and so on the many kinds of language gradually, is widely used in communication between nations, the strengthening of the international communication between, all kinds of talents loss, disseminator and user of language of German stand out in the lack of talent, lack of German use talent, German as an applied language, in addition to have the function of the communication, can also become a carrier of history and culture. Based on this, this paper focuses on the transformation of cognitive theory in German teaching, the form of free collaboration, the form and content of free writing, and the role of free collaboration in German teaching, for the reference of relevant personnel.