The feed-end sealing device for rod/sag mills features a split design based on the suspended sealing principle. It employs a dual-seal system: multiple precision-machined floating rings work in tandem with high-performance flexible rings to create a multi-stage sealing barrier. The core mechanism utilizes a non-contact suspended seal, where a precise gap between the rotating floating ring and the feed pipe generates a stable water film via fluid dynamics. This design eliminates wear associated with traditional seals by enabling non-contact operation, while the pressure-adaptive nature of the fluid medium ensures reliable sealing performance under complex operating conditions.