Besides the sessions of teaching and learning in language learning activities,language attrition,as the concomitant product of language acquisition,exerts significant impact on language teaching,especially on foreign language teaching.By exploring this phenomenon,some effective ways against language attrition can be found in order to maximize foreign language teaching.This paper is about to illustrate the relevant theories from scholars at home and abroad,and providing some ways to help foreign language learners maintain the language proficiency.