Abstract: Effective control on the filling and compaction quality of a dam body is the key to ensuring the safety of earth-rock dams. This paper presents an automatic rolling system, based on closed-loop feedback control and RTK-GPS, that can realize the accurate navigation and automatic rolling operation of vibrating rollers. This new system, composed of a remote monitoring device and an onboard automatic navigation control device, works in one of the three modes ? automatic rolling, remote control rolling, and manual rolling, and offers several functions ? wireless communication between equipment, automatic ignition starting, speed regulation, vehicle steering, and braking. It can also achieve an automatic navigation function by planning an overall path and local obstacle-avoiding paths through implementing an A* algorithm together with the RTK-GPS positioning technology. Application to the site compaction of dam construction projects shows that our new rolling system ensures the normal rolling operation in special or emergency situations; solves the problems of rolling omission, cross rolling, and repeated rolling around the joint of two adjacent layers; improves significantly the quality and efficiency of compacting operation. The system, of great application value, can be applied to various earthwork projects in such fields as water conservancy, road, railway, airport, and port engineering. Particularly, it is suitable for filling and rolling operation in dangerous environments or extreme conditions.