Power assist walking robot is a lightweight battery-driven wearable lower limb exoskeleton integrated with real-time gait sensing technology and self-adaptive servo power system, designed for multi-scenario mobility support including elderly daily walking aid, post-injury rehabilitation training, long-distance outdoor trekking and mild slope travel. This power assist walking robot can accurately capture standing, flat walking and uphill motion signals in real time, output graded soft auxiliary torque to hip and knee joints to lower lower limb bearing load, relieve muscle strain and joint fatigue after prolonged movement, and stabilize overall body balance to standardize irregular gait. The ultra-light high-strength composite frame meets IP54 dustproof and splash-proof standard, operating stably in home walkways, community roads, professional rehabilitation centers and gentle mountain trails. Widened soft padded adjustable binding straps fit users of various heights and leg circumferences, matched with interchangeable long-lasting lithium battery packs to provide all-day uninterrupted power assistance. Ergonomic flexible joints allow unrestricted natural limb movement, paired with intuitive one-button control that new users can master without complicated training. Built-in anti-fall warning, overload automatic shutdown and emergency stop safety mechanisms effectively avoid secondary physical injuries during use. This all-purpose power assist walking robot realizes seamless human-machine coordination, greatly improving long-distance walking comfort and extending mobility endurance for people with weak leg strength, hemiplegic rehabilitation patients and outdoor field staff.