Objective This paper is to discuss the clinical value of spiral CT in the diagnosis of lumbar intervertebral disc protrusion concurrently with spinal canal stenosis, in order to provide the reference for clinical diagnosis in the future, and improve the diagnosis level on lumbar intervertebral disc protrusion concurrently with spinal canal stenosis. Methods Fifty eight patients with lumbar intervertebral disc protrusion concurrently with spinal canal stenosis admitted by this Hospital during the period from January, 2011 to January, 2013 were selected as research subjects. The clinical data were retrospectively analyzed and summarized, and evaluated the clinical value of spiral CT in the diagnosis of lumbar intervertebral disc protrusion concurrently with spinal canal stenosis. Results Thirteen patients were diagnosed as dural sac impairment, 19 patients suffered from lumbar intervertebral disc protrusion, 9 patients suffered from ligament hypertrophy, 8 patients suffered from lateral recess stenosis, and 7 patients suffered from intervertebral foramen stenosis, the correct diagnostic rate was 96.5%, the p value was greater than 0.05 when compared to the surgery, and the differences had no statistically significant. Conclusions Spiral CT delivers important clinical diagnostic value in the diagnosis of lumbar intervertebral disc protrusion concurrently with spinal canal stenosis, and it demonstrated the spinal canal, nerve root and the ligament clearly, and had high diagnostic accuracy rate, which can provide reliable basis for the follow-up treatment of patients, and being worthy of wide use and promotions in clinical practices.