After hemiplegia ankle joint exercise methods mainly include joint mobility training, muscle strength training and ankle joint stability training. 1. Joint mobility training: including dorsiflexion, plantarflexion, inversion and eversion of the ankle joint. This can be done through the therapist’s manual passive activities, instrument-assisted activities or patient-initiated activities to avoid joint contracture and improve the range of motion of the ankle joint. 2. Muscle strength training: through heel lifting, EMG biofeedback assisted training, unarmed or instrumented resistance movement of the ankle joint, etc., to improve the muscle strength around the ankle joint and avoid muscle atrophy. 3. Ankle stability training: Balance trainer, balance board, BOSU ball and other devices can be used for ankle balance and coordination training, so as to improve the stability of the ankle joint and promote the recovery of lower limb function. It is suggested that hemiplegic patients should consult the doctor in time and carry out treatment and training under the professional guidance of doctors and rehabilitation therapists, and should not exercise blindly, so as to avoid adverse consequences.