Provided is a trolley driven by gravitational potential energy and capable of walking along an S-shaped route. The trolley comprises a trolley body portion, a steering mechanism and a drive mechanism, wherein the trolley body portion is composed of a trolley bottom plate, a drive shaft support, a front fork installation frame, a weight support and a weight support installation frame. The drive mechanism is composed of a drive shaft, a locking threaded sleeve, a fixing shaft, a left drive wheel, a right drive wheel, a drive gear, a front wheel, a weight, a front trolley fork, a proportional fixed pulley and two ropes. The steering mechanism is composed of a driven gear, a connecting rod and a front trolley fork swing rod. The trolley has the following advantages that the gravity center of the whole trolley is descended to the lowest point, and stability of the trolley is facilitated; the rotation angle of the front wheel can be accurately changed by means of the method that the length of the connecting rod is adjusted, and accordingly the trolley can be conveniently debugged; by means of a conical winding groove in the drive shaft, requirements of the trolley in running for different torques can be changed, and the situation that the trolley speeds up in running is avoided; the trolley is simple in structure, convenient to operate, low in cost and capable of walking a long distance.