Objective: This study aims to analyze the effect of core strength strengthening training on exercise-induced lumbar injuries. Methods: Sixteen athletes suffering from lumbar injuries were randomly divided into two groups, group A and group B. Group A performed core strength strengthening training, while group B only performed normal study and life. Before and after the experiment, the Visual Analogue Scale (VAS) score, lumbar spine mobility, Oswestry Disability Index (ODI) and overall effect evaluation of the two groups were recorded and compared. Results: After the experiment, the VAS score of group A decreased to 2.78 ± 1.89 points, the anterior flexion distance was 0.85 ± 0.03 cm, the left lateral flexion distance was 4.97 ± 0.02 cm, and the right lateral flexion distance was 3.32 ± 0.02 cm, and the ODI was 15.68 ± 6.73% (p < 0.05 compared to group B before and after the experiment). Overall, in group A, two athletes were cured, four athletes had significant improvements, and two athletes had a mild response, while the treatment was ineffective in group B. Conclusion: Core strength strengthening training enhances lumbar muscle strength and improves lumbar stability, showing a significant improvement effect on lumbar injuries.