The invention provides an automobile drive disc assembly, which includes a drive disc body, a starting ring gear, a signal tooth, a flange and a pressure plate. The starting ring gear is fixedly connected with the drive disc body, and the signal teeth are directly stamped on the outer peripheral wall of the drive disc body, and are integrated with the drive disc body, and the signal teeth are formed on the outer peripheral wall of the drive disc body. Evenly distributed on the top and perpendicular to the plane of the disc body, and two teeth are continuously removed from all the teeth, as a benchmark for judging the crankshaft timing phase. The flange plate and the pressure plate clamp the drive disc body in the middle, and the present invention directly stamps out the signal teeth on the drive disc body, and the integrated design of the signal teeth and the disc body avoids the trouble of secondary positioning. The matching accuracy of the sensors is higher, the accuracy and reliability of signal collection are improved, and the manufacturing cost is reduced. The introduction of the flange greatly improves the generalization rate of the key component crankshaft, and the central positioning hole is easier to process and the cost is lower.