The invention provides an automotive driving disc assembly, which comprises a driving disc body, a starting gear ring, signal teeth, a flange and a pressure plate. The starting gear ring is fixedly connected with the driving disc body; the signal teeth are formed by directly punching on the peripheral wall of an excircle of the driving disc body, form a whole with the driving disc body, are evenly distributed on the peripheral wall of the excircle of the driving disc body, and are vertical to a plane of the disc body; and two teeth are continuously eliminated in all teeth as a reference of judging a timing phase of a crank shaft. The flange and the pressure plate clamp the driving disc body in the middle. By directly punching the signal teeth on the driving disc body and through the integrated design of the signal teeth and the disc body, the automotive driving disc assemble avoids the trouble of twice positioning, has higher match precision of the signal teeth and the disc body, improves the acquisition precision and the reliability of signals, and reduces manufacturing cost. By introducing the flange, the generalization rate of key component crank shafts is greatly improved, a center positioning hole is processed more easily, and the cost is lower.