A new round of English teaching reform is aimed at constructing new mode of teaching, which is centered on enhancing foreign language comprehensive application ability of students. The diversification of English teaching model is the development tendency of English teaching. As the main entry point of personal training mode of education, it is now positively promoting the major reform of educational field in China. At the same time, single-chip project type teaching has broken the traditional knowledge system. Based on constructivism, situation theory and pragmatic theory and centered on work task, single-chip project selects and organizes course content. And finish of work task is its main learning style. This paper listed one teaching case and imitated the job fair one by one, and elaborated the construction of diversification of English teaching model from the perspective of project teaching.