Abstract: The form of psychological experience in language can be divided into representation language and conceptual language. The representation language is a mental representation or picture under the form of rational space-time, and it is a representation or picture in the sense of generality and universality. As a primary psychological language form with intuitionistic experience, the representation language has its own characteristics and is where the pre-concept exists, which can be labeled as a form of psychological language without distinction. The content and position of representation language are the inevitable result of intuitive experience and the cause of the formation of conceptual language. The representation language unifies in the psychological language phenomenon, in the language existence, and finally in the rational existence. Therefore, it manifests as a rational transcendental language form under the psychological language form.

Key words: language, rationality, representation, psychological form, representation language