Intelligent recognition algorithm was developed by combining industrial robot technology, vision sensor technology, PLC control technology, Profibus-DP and modbus industrial network technology,which can improve the recognition rate of the vision sensor.The transformation of the assembly line of the clutch pressure plate of traditional automobile enterprises was completed by the the intelligent recognition algorithm.The improved production line can complete the finished product defect inspection, assembly, automatic storage, automatic marking and other processes, through the manipulator and automatic tooling to pick up and put down workpieces. The practical application shows that the improved production line can better solve the problems of low detection efficiency and high error detection rate in manual detection, and has higher reliability and practicability.