ABSTRACT Teaching, particularly in a second/foreign language (L2) context, is an emotionally demanding profession, often leading to negative outcomes for educators. Teaching, particularly in a second/foreign language (L2) context, is an emotionally demanding profession, often leading to negative outcomes for educators. To fill the gap, this phenomenological study examined the causes, consequences, and regulation strategies of Chinese EFL teachers’ emotional exhaustion. A semi-structured interview was held with 58 teachers. The results of thematic analysis revealed that this emotional state had different causes and consequences. The most frequent causes were ‘occupational pressures’, ‘identity conflicts and mismatches’, ‘stressful classroom climate’, ‘high expectations’, and ‘students’ poor performance and cooperation’. Additionally, it was found that teachers’ emotional exhaustion can mostly lead to ‘poor teaching quality’, ‘job burnout’, ‘low work engagement’, ‘low teaching enthusiasm’, and ‘various other negative emotions and outcomes’. To regulate such an aversive feeling, the participants used a range of preventive and responsive strategies before and after its occurrence. The study discusses the findings and presents some conclusions and implications for Chinese L2 teachers, teacher trainers, and policy-makers to raise their understanding of the nature and mechanism of emotional exhaustion in teaching English and its regulation.