Abstract: From the postmethod perspective, the present study intends to explore the construction of English class ecology. Different from any other traditional teaching method and approach, postmethod is a new critical thinking for language teaching, which is beyond any ONE teaching method. Firstly, the paper discusses the building of language teaching ecology based on the basic principle of postmethod, namely learner autonomy, teacher autonomy and teacher empowerment. Then, guided by the philosophy of particularity, practicality and possibility, the study probes into how to maximize teachers' initiative and creativity according to various teaching situation and optimize English class ecosystem structure, so as to establish a harmonious, healthy and vibrant ecosystem language class.