The anchor section joint is a critical weak point in the ‌rigid catenary system‌, where pantograph carbon skateboards are prone to excessive wear, uneven abrasion, and arcing. This study explores how varying stagger values affect the current-carrying friction behavior and wear mechanisms within the overlap section. The stagger value is the lateral offset of the contact wire relative to the center of the pantograph carbon skateboard. The results showed that: Under non-current conditions, increasing stagger exacerbated mechanical wear, raising the friction coefficient from 0.35 to 0.41. Under current-carrying conditions, as the stagger value increased from 0 mm to 30 mm, the wear mechanism transitioned from adhesive wear to oxidative wear. At 30 mm, the friction coefficient, electrical contact resistance, and wear rate reached their minimum. Oxide film formation and destruction mainly drove tribological differences in friction pair