Achilles tendon reflex examination method, first asked the patient supine position or prone position, flexion of the knee about 90 degrees, or asked the patient kneeling on the bed, and then the examiner’s left hand to make his foot dorsiflexion, the right hand holding the percussion hammer, percussion of the patient’s Achilles tendon. The reflex activity is characterized by a contraction-like state of the gastrocnemius and soleus muscles and a flexion-like state of the toes. The Achilles tendon reflex can reflect the damage status of sacral 1-2 nerve or tibial nerve. If the patient’s lumbar disc herniation compresses the patient’s sacral nerve, checking the patient’s Achilles tendon reflex, the Achilles tendon reflex may be weakened, and through the judgment of the Achilles tendon reflex, it can roughly understand the situation of the patient’s sacral nerve damage.