Davidson studied on the theory of meaning undergone the period of change, modifi- cation, development. His later theory of meaning was obviously different from his early theory of truth-conditional meaning, his later tried to put forward a new language theory of understanding, this new language theory of understanding and Gilbert Ryle studying on theory of "knowing how" had the essence of relations. Therefore, the paper try to demonstrate Davidson's later theory of meaning is a kind of theory of"knowing how". The interpreters know how to u...