College English teaching in China has made great efforts in "teaching" and "learning" English and achieved gratifying successes in both theoretical and practical aspects. However, it has been constantly criticized by the people. The main reason is that college English teaching focuses too much on the "teaching" and "learning" of English while attaches less value to the "using" of the language. The author believes that the key to successful college English teaching is the organic integration of "teaching", "learning" and "using", and especially is the "using". On the basis of Learning-using Integrated Principle, this paper, through questionnaires , demonstrates the importance of "language output" in improving college students’ English linguistic ability, and puts forward corresponding solutions in light of the current situation of college English teaching in China.