The aim of study was in an attempt to investigate EFL high school teachers’ strategies to promote students’ willingness to communicate (WTC) in English. The research was conducted on 51 participants in the Mekong Delta. Three research instruments were employed including questionnaires, interview and classroom observation in order to explore teachers’ perceptions of strategies to promote students’ WTC in English and their actual practices. The results from quantitative data revealed that teachers’ evaluation of strategies was significantly high. Moreover, participants reported that they highly frequently implemented strategies to increase students’ WTC in English. Interestingly, there is a high correlation between teachers’ perceptions and their practices from their self-report; however, the results indicated the mismatch between teachers’ perceptions and their actual practices in strategies to promote students’ WTC in English insight from classroom observation. The study was expected to contribute to the comprehension of teachers’ strategies to enhance students’ WTC in English.