One of the issues facing English teaching in junior high schools in the present is low classroom teaching efficiency. The study indicates that according to the traditional teaching model which is teacher centered, only 32.40% of students in the classroom get to participate, less than 20% of the total classroom time is spent in deep thinking, and less than 41.80% of the total classroom time is spent effectively by students in the classroom according to the survey data analysis of 1,248 junior high school and English teachers, 560 students, and 38 teaching researchers in a given city. The design of learner-centered instruction, with the specific and accurate analysis of the learner situation, the use of real-world and real-life tasks as the generators of autonomous learning process, and various assessment and feedback methods, is observed to improve the classroom participation of the learner to 76.50, the related percentage of deep thinking Portuguese to 58.30, and the efficiency of learning process to 82.60 of the total classroom time, which fully proves the considerable impact of learner-centered teaching design on the enhancement of classroom efficiency.