Abstract: first introduces the educational information system and digital design technology. Inspired by the layered design of the educational information system, it realized the digital design of agricultural machinery by combining digital design technology. Then, it introduced the composition and principle of precision metering device, and realized the digital design of wheat precision metering device by using digital technology. From the final design of the wheat precision metering device, the system can quickly design agricultural machinery modules, greatly reduce the product design cycle, and reduce the number of repeated product modifications, which is of great significance to modern agricultural machinery design.