Against the background of the full implementation of the new curriculum standards, junior high school English teaching is shifting from fragmented class-hour teaching to systematic unit teaching. The “Teaching-Learning-Assessment” integration serves as the fundamental concept to guarantee the quality of unit teaching and achieve the cultivation of core competencies. This paper introduces the connotation of the “Teaching-Learning-Assessment” integration, analyzes the problems existing in junior high school English unit teaching, expounds the value of integrating the “Teaching-Learning-Assessment” integration into junior high school English unit teaching, and probes into the strategies of junior high school English unit teaching based on the “Teaching-Learning-Assessment” integration from the aspects of teaching objectives, teaching process, teaching evaluation, teaching resources and support. It provides a reference for the implementation of English core competencies in English teaching and the improvement of junior high school English unit teaching.