This thesis is pided into five parts.There are five chapters in this thesis. In the first chapter, the author introduces the background development. In the second chapter, the author introduces the outline of task-based language teaching. In the third chapter, the author analyzes the detail process about how to research the task-based language teaching in senior high schools. In the fourth chapter, the author introduces the research results and discussion of task-based language teaching. The fifth chapter is conclusion and the author will gives some advice.