Abstract: Taking Proteus and LabVIEW as the development platform, single-chip microcomputer as the lower computer, and the upper computer using virtual instrument technology, an automatic classification system for sheet parts was designed. The system has the functions of automatic sorting, transmission, weighing, classification, and information display of sheet parts. The single-chip microcomputer control system is used to realize the functions containing sorting and conveying of sheet parts, weight acquisition and processing, automatic classification and result information display, and serial communication. The virtual instrument system realizes data receiving and processing, real-time display and data storage. The co-simulation of upper and lower computer and physical demonstration show that the control system works well and has a good human-computer interaction ability, which can greatly reduce the work intensity and effectively improve the detection efficiency.