The invention relates to a device for exercising dorsal muscles, shoulder muscles and triceps brachii muscles, and belongs to the field of body-building devices. The device comprises a frame, handles,counterweight devices, ropes and pulleys. The counterweight devices comprise bolts, locating rods, counterweight rods and counterweight blocks. The working process of the device for exercising the dorsal muscles, the shoulder muscles and the triceps brachii muscles comprises the steps that a trainee sequentially pushes the left handle and the right handle, in the process, the handles drag the ropes, and the counterweight blocks in the counterweight devices are pulled up; by means of weight training, better exercising effect is achieved. For weight selection of weight, the multiple counterweight blocks with the corresponding weight are connected with the counterweight rods through the bolts, and different weight training effects are achieved. According to the device for exercising the dorsal muscles, the shoulder muscles and the triceps brachii muscles, the structure is simple, various muscle groups of upper limbs can be fully subjected to coordination training, and the muscles of multiple parts can be trained at a time; on the other hand, the left counterweight device and the right counterweight device are independent, and by adjusting the weight on the two sides, the weak limb side is strengthened.