As a famous foreign language educationist, Zhang Shiyi built a new foreign language teaching theory---Situational Teaching Approach of Foreign Languages, which experienced the beginning stage, the devel- opment stage and the maturity stage from 1920s to 1940s . Its content mainly includes theoretical foundation, basic principles and practical application. This theory was not only put forward earlier than other similar language teaching thoughts at home and abroad, but also influenced formulation of curriculum standards, compilation of textbooks and practical application of language teaching me...