Teaching English for vocational purposes needs to be customized to students’ needs related to the field of study. Most pre-service English teachers still difficult to conduct effective learning during their teaching internship. This study describes the pre-service English teacher's perception of teaching English at a vocational high school and what challenges they face during the teaching internship program. The data were obtained from two female pre- service English teachers during the academic year 2022/ 2023 at English Education Department, Walisongo State Islamic University with different educational backgrounds and experiences. This research was qualitative research using a case study design with a data collection method through in-depth interviews. The data showed that most pre-service English teachers' perceptions are negative. In addition, the participants admitted that they found challenges such as difficulty in finding various authentic sources, limited instructional time, and conducting effective classroom management. This result was evidenced by the participant's experience during a teaching internship in most aspects.