This experimental study explores the effectiveness of the Task-driven Chunk-based Training Model (TCTM), whose fundamental characteristics are task-driven, chunk-based, teacher-guided and student-centered. With the organic integration of different tasks into chunk-based approach, this training model effectively promotes learner autonomy in students and thus contributes to the evident improvement of students’ comprehensive language ability. In addition, a one-year experiment was carried out to prove the effectiveness of the training model. The results show that the experimental group made significant improvement in their listening, reading, writing and translating abilities. The relevant questionnaire result shows that the model also helps to develop learners’ language internalization ability and their learning activeness, and thereby their dependence on teachers lessens.