The trainer's teaching work does not include communicating with the school to confirm the time, place and process of training. Trainer refers to a person who can combine economic development, technological progress and employment requirements, research and develop new vocational (post) training programs, master and apply modern training concepts and means, plan and develop training programs according to the needs of enterprise production and operation, formulate and implement training plans, and engage in training consultation and teaching activities. The market is mainly divided into enterprise trainers and professional trainers. Trainers should be professional, efficient, good in image and temperament, able to adapt to frequent business trips and lectures, and avoid mystifying, reading the book, and delaying class hours.