The invention relates to an S-shaped track carbon-free toy car. The S-shaped track carbon-free toy car is characterized by comprising an object falling cotton rope, a transmitting cotton rope, a bottom plate, a sleeve, an installing frame, a dual wheel, a winding shaft, a winding shaft gear, a supporting base, a back wheel shaft, a back wheel, a differential mechanism, a turning mechanism and a front wheel. The S-shaped track carbon-free toy car is driven by gravitational potential energy, namely, the gravitational potential energy generated during weight falling is changed into the kinetic energy for driving the front wheel to turn and the back wheel to advance; the S-shaped track carbon-free toy car is environmentally friendly, free of carbon, compact in structure, low in cost, small in site dependence and high in interestingness and competitive performance, knowledge enriching and horizon expanding of adolescents are facilitated, the manipulative ability and the brain using ability of the adolescents are developed, and the comprehensive quality of the adolescents is improved.