Abstract: In view of the existing problems of poor roof stability,low positioning accuracy of excavation equipment,high safety risk in manual operation and others in the 509 working face of Wangjialing Coal Mine,research is conducted on construction of intelligent excavation system based on 5G technology.The EBZ200 cantilever roadheader is upgraded and transformed,integrating inertial navigation device,total station,and multi-directional sensor to achieve real-time and accurate monitoring and automatic cutting of the roadheader;Using total station and inertial navigation device combination system to construct precise equipment navigation and positioning system;Through 5G network,remote control and real-time data transmission of devices can be achieved.The results show that the roadheader can achieve unmanned,automatic,safe and efficient cutting,significantly improve positioning accuracy,reduce errors to 0.1 m,reduce the actual operation time of operators,improve safety by about 90%.The intelligent management of auxiliary transportation system and power guarantee system effectively reduces equipment maintenance costs by 50% and operator labor intensity by 40%,resulting in significant safety and economic benefits.