Objective To analyze the clinical symptoms scores and CT imaging changes of patients with lumbar disc herniation before and after conservative treatment. Methods 120 cases of patients who were clinically diagnosed as lumbar disc herniation in the past year (from February 2017 to February 2018) were given clinical symptoms scores and CT scans before and after conservative treatment. According to the clinical symptoms scores before treatment, the degrees of disc herniation were divided into mild, moderate and severe degree. The clinical symptoms scores and CT imaging changes of the three groups were analyzed before and after conservative treatment. Results Among 120 patients, mild, moderate and severe groups were with 38 cases, 57 cases and 25 cases respectively. After treatment, the clinical symptoms scores of mild patients were significantly lower than those before treatment (P<0.05), and there were no significant changes in the clinical symptoms scores after treatment in moderate and severe patients (P>0.05). After treatment, the CT value of disc herniation, the anteroposterior diameter of spinal canal, and the lateral recess width were significantly lower than those before treatment (P<0.05), and the CT value of disc herniation in moderate patients was significantly lower than that before treatment (P<0.05), and there were no significant changes in the CT value of disc herniation in severe patients and the anteroposterior diameter and lateral recess width of moderate and severe patients compared with those before treatment (P>0.05). Conclusion Clinical symptoms score and CT imaging changes can provide a theoretical basis for effects of conservative treatment for patients with lumbar disc herniation, and it can be used for the evaluation of patients with intervertebral disc.