Lumbar pain should be based on the initial diagnosis of the choice of different auxiliary tests can be done to clearly show the lesion situation, can be divided into the following cases: First, such as the preliminary suspicion of lumbar spine bony lesions, such as lumbar vertebrae fracture and dislocation, lumbar vertebrae joints dysfunction, lumbar spine instability, lumbar spine slippage, etc., should be the first choice of lumbar spine X-ray, lumbar spine, lumbar spine X-ray, double oblique position, the lateral lumbar vertebrae stress film can clearly show the above lesions. Secondly, if preliminary consideration is given to lumbar disc herniation and lumbar spinal stenosis, CT examination of lumbar intervertebral discs should be preferred, which can clearly show the above lesions; thirdly, if preliminary consideration is given to spinal nerve injury, MRI examination of the spine should be preferred, which can clearly show spinal nerve injury and degeneration.