The invention relates to a transportation tool. A transportation vehicle comprises a support plate and a base plate. Two pairs of support columns are arranged on the base plate. Wheel shafts are installed on each pair of support columns. Wheels are connected to two ends of each wheel shaft. Support rods are arranged between the support plate and the base plate. The support plate is capable of sliding on the support rods. Springs are arranged on the support rods. Upper belt wheels are arranged on ends, away from the wheel shafts, of the support columns. Transmission belts or transmission chainsare installed between the upper belt wheels and the wheel shafts. Connection devices are arranged between the support plate and the transmission belts or the transmission chains. The connection devices are capable of driving the transmission belts or the transmission chains to rotate. According to the invention, the vehicle is capable of walking to a preset position and returning back automatically without consuming power in the whole processes, thereby achieving zero discharging.