Abstract: The modern mentorship is the product of work-integrated learning and internship development.It is an important part and supplement of vocational education.Based on the knowledge conversion and field theory, it analyzes the knowledge transmission process,rule, environment and mechanism of modern mentorship teaching mode.It motivates master’s subjective initiative and to pass on his own skills through the demonstration, encourages master to explore their own tacit knowledge and express it.Based on the management mechanism, it encourages apprentices to explore actively,imitate carefully,practice hard, make good summary, strive to make inventions and improve themselves in the master＇s transmission process.