This invention discloses an automotive wind generator capable of converting the wind energy produced from driving into the electric energy, comprising an inner rotor, which is driven to rotate by an automotive motive power machine; an outer rotor, which is driven by wind power to rotate coaxially and reversely relative to the inner rotor; wherein the inner rotor is arranged on a spindle which is mounted on an end cover through support of a bearing group; the outer rotor is driven by an impeller fixed thereon, and the outer rotor is sleeved out of the inner rotor and is mounted on the end cover through support of the bearing group. This invention also discloses an automobile mixing dynamic units adopting the above automotive wind generator, which is composed of the automotive motive power machine which transmits the power produced from a machinery transmission system to an automobile drive shaft; the wind generator unit, which is composed of at least the automotive wind generator, the inner rotor of the automotive wind generator being driven to rotate by the automotive motive power machine through a transmission mechanism; an accumulator cell, which is charged by the wind generator; and a motor powered by the accumulator cell and driving the automobile's driving shaft.