This paper chooses two classes as the research object, makes some questionnaire surveys and tests and analyzes the effects of learning strategies used by the students so as to improve their autonomous learning ability in Englihs major of vocational technical colleges. The result shows that training the students to apply learning strategies will help the them enhance their autonomous learning ability, hence improving their academic records. Further relevance analysis shows that there is a notable positive correlation between learning strategies ,autonomous learning ability and their academic records.