Pragmatic interface study has evolved into a new approach of pragmatics development with the development of interdisciplinarity. Pragmatic interface study, on the basis of the integration of pragmatics and other disciplines, is a methodology which probes into the problems of pragmatic interface. In other words, it has a deep investigation into the problems of boundary work and of crossdisciplinary research between pragmatics and other disciplines, which is characterized by interdisciplinarity, pragmatic symbiotic and practicality.