EFL教师跨文化教学能动性对于培养具有国际视野和全球胜任力的外语人才至关重要。文章基于社会文化活动理论，探究校本专业学习共同体如何促动EFL教师在跨文化教学中的能动性发挥。通过收集分析反思日志、访谈、课堂观察等数据发现，专业学习共同体围绕跨文化要素开展针对性的学习活动，合作学习氛围和社会网络支持，激发教师探索跨文化教学动机，促动教师构建跨文化教学知识体系，并赋能教师开展跨文化教学与研究。研究不仅从活动理论视角探究校本专业学习共同体对EFL教师能动性提升的促动因素，也为EFL教师跨文化教学能力提升及专业发展路径的实证研究提供了思路和方法借鉴。

EFL teachers' agency in intercultural teaching is crucial for cultivating foreign language talents with international visions and global competence. Based on the activity theory, the study explores how a school-based professional learning community facilitates EFL teachers' agency in intercultural teaching. Through the collection and analysis of reflection logs, interviews, classroom observations and other data, it was found that the professional learning community's targeted learning activities centered on intercultural elements, cooperative learning atmosphere, and social network support stimulated teachers' motivation to explore intercultural teaching and learning, facilitated them to construct an intercultural teaching knowledge system, and empowered them to carry out intercultural teaching and research. The study not only explores the facilitating factors the school-based professional learning community exerted to promote EFL teachers' agency from the perspective of activity theory, but provides ideas and methodological references for empirical research on EFL teachers' intercultural teaching competence and professional development.