Foot drop is characterized by weakness of the ankle joint and dorsiflexion of the toes, and the etiology includes neurological, muscular, anatomical and other related diseases. Neurological diseases are the most common cause of foot drop, divided into central nervous system and peripheral nervous system damage, the former such as intracranial lesions, motor neuron disease, etc., and the latter such as lumbosacral radiculopathy, common peroneal nerve injury, peripheral neuritis, etc. The lumbar spine is the hub of the human trunk activities, and all physical activities are invariably increasing the burden of the lumbar spine, with the growth of age, excessive activities and overload bearing, so that the lumbar spine accelerated aging, and under the action of external forces, secondary pathological changes, so that the intervertebral disc fiber ring rupture, the nucleus pulposus within the disc protrusion, or ligament, small joint and other degeneration, the development of lumbar degenerative disease. Lumbar degenerative diseases mainly include lumbar disc herniation and lumbar spinal stenosis, which are common causes of back and leg pain, and can be accompanied by sensory and motor disorders of the lower extremities in severe cases. However, foot drop is a relatively uncommon sign for lumbar degenerative diseases. Foot drop is found in 2.2% of cases of lumbar disc herniation in combination with foot drop. Once foot drop occurs, it causes more serious dysfunction and seriously affects the quality of life of patients. Therefore, for lumbar spine diseases, early diagnosis and treatment should be carried out. According to the symptoms, signs, imaging performance, etc., choose a scientific and reasonable treatment plan. With the development of technology, lumbar spine surgery has become very mature and patients have more choices, so do not blindly reject it.