Outdoor power assist exoskeleton is a heavy-duty battery-powered wearable lower limb exoskeleton optimized for all kinds of complex outdoor environments including mountain hiking, long-distance field patrol, terrain survey and hillside walking. Equipped with terrain adaptive AI gait sensors and high-efficiency low-consumption servo drive system, this outdoor power assist exoskeleton can instantly distinguish flat roads, uphill slopes and downhill sections, distributing balanced auxiliary power to hip and knee joints to greatly cut leg bearing pressure, delay muscle soreness and reduce knee joint wear during all-day outdoor travel. The ultra-light high-rigidity industrial composite frame features IP54 dustproof, waterproof and scratch-resistant outer shell, effectively blocking mud splashes, light rain and road dust to adapt to variable outdoor road conditions. Fully adjustable thick soft padded straps fit users with different heights and leg circumferences, equipped with large-capacity swappable lithium batteries to support long-hour continuous outdoor power assistance. Ergonomic flexible joint structure will not restrict natural walking, climbing and descending movements, with simple one-touch control easy for outdoor workers, forest rangers and hiking enthusiasts to operate. Multiple safety protection modules including overload stop and balance stabilization function are built in to improve outdoor use safety. This durable outdoor power assist exoskeleton achieves smooth human-machine coordination, significantly extends outdoor activity endurance and improves long-distance walking comfort for field operators and senior outdoor lovers with insufficient leg strength.