The invention discloses a four-link walker. The walker comprises a main rack and a main vertical rack which are horizontally connected, the main rack also comprises a left swing rack and a right swingrack, and the left swing rack comprises a left swing upper rack body and a left swing lower rack body; the right swing rack comprises a right swing upper rack body and a right swing lower rack body,the left swing upper rack body and the right swing upper rack body are provided with inner limit blocks, so that the exercise safety is guaranteed, and the left swing lower rack body and the right swing lower rack body are provided with pedal racks. According to the four-link walker, by adopting a four-link structure, when the human body carries out walking exercise, all the joints cooperate for exercise at the proper positions, in this way, the joints are not injured, the small muscle groups cannot be injured, and meanwhile the exercise aim is achieved; the informatization function is additionally achieved, the walker can guide people in scientific fitness and happy fitness, the fitness effect is displayed, and the voice is intelligently broadcast anytime.