The invention discloses a carbon-free cart for traversed S-shaped traveling. A front wheel (14) is installed on a front wheel bracket (6) through a front wheel steering shaft (5), a dead pulley (1) is installed on a potential energy bracket (3), a driving shaft (15) is installed on a driving shaft bracket (16), a driving wheel (17) and a driven wheel (8) are installed on the driving shaft (15), left and right pinions (18, 19) are installed on the driving shaft (15), left and right gear wheels (11, 10) are installed on a bottom frame (13), the left and the right pinions (18, 19) are engaged with the left and the right gear wheels (11, 10), a rope (4) for connecting a potential energy block (2) is wound on the left gear wheel (11) bypassing the dead pulley (1), and two ends of a connecting rod (9) are respectively connected with the right gear wheel (10) and the front wheel steering shaft (5). In the invention, potential energy generated in the falling process of the potential energy block is utilized as kinetic energy to push the cart to move forwards, and barriers arranged on a track can be automatically avoided according to a certain period and long distance during advancing.