The age, smoking, drinking, BMI and other factors were corrected in this study with patients in group A (hs-CRP<1 mg/L) as control group, and the multivariate Cox proportional risk regression model analysis results showed that the incidence rates of lung cancer in patients in group B and C were 1.37 and 1.69 times as high as that in group A respectively. Here, CRP is linked to lung cancer.