The invention relates to the technical field of sports teaching equipment, and particularly relates to a dorsal muscle trainer used for sporting teaching. The dorsal muscle trainer comprises a base and a machine body arranged on the left end of the base, wherein a cross beam is arranged above the machine body, and the lower end of the cross beam is connected with a handle. According to the invention, a backboard is additionally arranged at the front end of a base frame, the inclination angle of the backboard can be adjusted, and the height of a foot pad at one end of the base can be adjusted,so that not only can dorsal muscle be trained, but also the two legs can be placed above the foot pad, and the foot pad is matched with the backboard to train the muscle of the waist; a round tube anda circular ring on the round tube are additionally arranged below a cross board, and an elastic stay cord is hung on the circular ring, so that the dorsal muscle is further trained, and the functionis diversified; due to the arrangement of the telescopic handle, the multifunctional dorsal muscle trainer provided by the invention can adjust the length of the handle according to the conditions ofthe shoulders and the hands of a user when in use, and therefore, the application range is widened, the operation is simple, and the trainer has relatively strong practicability.