教师对语言、语言学习、语言文化的教学信念在很大程度上影响其教学行为。要理解教师的教学行为,其教学信念则是必须考虑的因素之一。本文论述了外语教师信念的形成、来源,以及发展过程,并提出了促进教师反思是改变和发展教师信念的有效途径,教师信念的发展则是外语教学改革的关键。 Teachers’ teaching beliefs about language, language learning and language culture have a great influence on their teaching behavior. To understand the teaching behavior of teachers, their teaching beliefs are one of the factors that must be considered. This article discusses the formation, origin and development of foreign language teachers’ beliefs. It also points out that promoting teacher reflection is an effective way to change and develop teachers’ beliefs. The development of teacher ’s beliefs is the key to the reform of foreign language teaching.