With the spread of English as a global lingua franca, many governments have developed and implemented new curricula and pedagogies, aiming to enhance English competence for personal and national participation in a globalised world. In Vietnam, the Government established Project 2020 (since relabelled Project 2025), a reform of the national English language curriculum in the schooling system to renovate the English education at the school level. However, little is known about how Vietnamese teachers actually regard the change and the practical challenges to the curriculum implementation at the local level. This paper explores the attitude of Vietnamese teachers towards the new curriculum for secondary classrooms. Drawn from an online survey and interviews with teachers, the research findings indicate positive attitudes among the teachers concerning the necessity of the curriculum reform, while showing their doubts and more negative evaluations of the overall feasibility of the new curriculum, both its goals and its pedagogic approach. A number of constraints hindering the success of the change are discussed and recommendations are made including the need to establish appropriate in-service teacher professional development as an essential aspect of the reform.