This equipment trains the push and pull movement of the upper limbs on the vertical plane; At the same time, strengthen the muscle chain of the active and antagonistic muscles. On the premise of ensuring the safety of patients, carry out efficient training; The two-way hydraulic resistance can start from the lowest limit set, with small inertia, so as to avoid damage to patients during use; Comfortable use experience. Special design is adopted for the stressed parts of joints, which conforms to the principle of human morphology.