English audio-typing is a college skill-training course that integrates professional knowledge such as English listening, typing and business and secretarial English. Its main purpose is to use a large number of English simultaneous listening and typing training to master the audio-typing skills, so that they can independently or assist in English audio-typing tasks on various occasions. Based on the Monitor theory proposed by Krashen, this study attempts to use the “i+1” approach to design the teaching of the course, analyzes the obstacles from the angles of listening comprehension ability, typing skill and listening and typing skills and explores the countermeasures. The study conducted experimental teaching and discussed the pre-test and post-test data of the typing and audio-typing speed from the results of T test. In conclusion, English audio-typing teaching based on the Monitor theory can effectively and significantly improve the students' typing and audio-typing speed.