The name of the present invention is the variable-speed horizontal elevator mechanical system. Aiming at the disadvantage that the current horizontal elevators are all designed at a uniform speed, and its speed is inconsistent with the safety of people getting on and off the elevator, it realizes the speed of the entrance section, middle section and exit section of the elevator. The free setting, the function of smooth transition between different speed sections can also realize smooth turning, so that the safety, applicability and speed of the elevator can be taken into account. In the present invention, the elevator speed is directly proportional to the distance between the crawler belts of the elevator, and the distance between the crawler belts is controlled by the slider, the slider limit guide rail and the cable mechanism. By setting the position of the slider limit guide rail, the elevator speed can be set there. The present invention can be widely used in airports, subways, railway stations, business districts, scenic spots, etc. In the future, it can also be built along the main streets of the city, making it the backbone of urban traffic together with subways and buses.