The invention provides a sail car which comprises a car underframe, a steering mechanism, a control mechanism and a driving mechanism. The steering mechanism, the control mechanism and the driving mechanism are arranged on the car underframe. The steering mechanism comprises a rotary shaft which is arranged on the upper portion of the car underframe and rotationally connected with the car underframe. The two ends of the car underframe are each provided with a steering disc. The two sides of each steering disc are each rotationally connected with a wheel rocker arm. The end of each wheel rocker arm is rotationally connected with a detachable motion part. The two ends of the rotary shaft are each in fastened connection with a first bevel gear. Each steering disc is in fastened connection with a second bevel gear engaged with the corresponding first bevel gear. The control mechanism comprises an operating platform which is in fastened connection with the rotary shaft and is parallel to the car underframe, and a sail mechanism is arranged on the operating platform. The sail car is easy to operate, low in manufacturing cost and environmentally friendly, and energy is saved. The motion parts can be detached, and therefore the motion parts can be replaced according to different landforms and season needs.