Long-distance positioning is critical for stacker-reclaimers in large bulk material yards. Traditional encoders and limit switches suffer from wheel slip, rail wear, and long travel distances, causing inaccurate stacking and reclaiming. A dedicated long-distance positioning system combines GNSS RTK, laser ranging, and inertial sensing to provide stable absolute coordinates along the rail and yard. A rugged GNSS base station and dual-antenna rover work with wireless RTK corrections. When tall stockpiles block satellite signals, laser and encoder data are fused by a Kalman filter for continuous output. Real-time positions are mapped to yard coordinates, enabling automatic anti-collision, precise pile profiling, and efficient travel control. Operators can monitor position, speed, and drift on the central screen. Installation requires careful antenna placement, machine geometry calibration, and regular cleaning of optical windows. The result is lower collision risk, less spillage, higher automation uptime, and reduced maintenance cost. The system supports PLC, SCADA, and yard management integration, with alarms for deviation, communication loss, and abnormal speed. Its IP67 enclosure and redundant power input improve reliability. During commissioning, reference points are surveyed and key positions validated. For coal, ore, and grain terminals, this technology supports stockpile management and unmanned operation. By replacing manual observation with continuous data, it reduces human error and shortens cycle times. A robust long-distance positioning system is a practical foundation for automated stacker-reclaimer control in harsh industrial environments.