Long-term bed rest and sitting in early rehabilitation patients are likely to lead to hypostatic pneumonia, bedsores, muscle atrophy and other problems. Lower limb exoskeleton robot supports patients to stand and walk, which plays an important role in preventing related complications in early rehabilitation patients.The RAT-02 has automatic leg length matching function and adopts a rigid flexible coupling structure design. The efficient and stable flexible driving joint module is delicate and smooth. The electronic control system and battery are highly integrated into the backpack and do not require user load-bearing. The product is equipped with soft biomimetic protective gear made of high elasticity fabric, and is matched with a suspension weight reduction and shock absorption frame that adapts to the walking center of gravity, ensuring safe and comfortable interaction of the entire machine. The product uses multi-dimensional sensors such as torque, IMU, and distance for perception. After information fusion, it accurately perceives intentions and matches multiple rehabilitation training modes such as safety and compliance force control, individual adaptive gait algorithm, active passive, and resistance assistance. By continuously repeating and learning physical activities, it promotes the recovery of central nervous system injuries and gradually enhances the ability of lower limb autonomous walking.The entire RAT-02 machine has beautiful and smooth lines, and adopts a smooth gradually disappearing surface matching the built-in structure, which is compact and generous. Multiple interactive materials are used interchangeably, paired with blue and white colors to showcase a sense of technology and modernity.Combining self-developed personalized bionic gait data and individual gait training learning models, the exoskeleton is controlled through multi-channel sensing fusion perception, high-performance flexible joints, and force position hybrid control algorithms to achieve smooth and safe control of gait, making rehabilitation training softer.