Objective: To investigate the changes and significance of serum inflammatory factors, uric acid (UA), homocysteine (Hcy) and small dense low-density lipoprotein (sdLDL-C) levels in patients with coronary heart disease (CHD). Methods: 152 patients with CHD were selected as the CHD group, including stable angina pectoris (SAP group, n=48), unstable angina pectoris (UAP group, n=55), and acute myocardial infarction (AMI group, n=49), according to the Gensinis score, it can be divided into mild group (n=88), moderate group (n=43) and severe group (n=21), at the same time 55 healthy people were selected as control group. The serum inflammatory factors [hypersensitivity C reactive protein (hs-CRP), tumor necrosis factor -α (TNF-α)], UA, Hcy and sdLDL-C levels were compared between patients with different CHD and different degree of coronary artery lesions. Results: The levels of hs-CRP, TNF-α, UA, Hcy and sdLDL-C in the CHD group were significantly higher than those in the control group (P<0.05); In the CHD group, the levels of hs-CRP, TNF-α, UA, Hcy and sdLDL-C in the UAP group and AMI group were significantly higher than those off the SAP group, and the level of AMI group [(7.96±1.49) mg/L, (92.87±14.50) ng/L, (417.75±43.88) mol/L, (23.25±7.33) and mol/L (1.31± 0.53) mmol/L] was significantly higher than that of UAP group [(6.15±0.97) mg/L, (73.88 ±9.27) ng/L, (393.63±68.29) mol/L, (19.67±7.26) mol/L and (1.08±0.44) mmol/L] (P<0.05); Compared with mild group hs-CRP, TNF-α, UA, Hcy and sdLDL-C levels, the levels of the moderate group and severe group were significantly increased, and the level of severe group was significantly higher than that of moderate group (P<0.05). Conclusion: The levels of serum inflammatory factors, UA, Hcy and sdLDL-C in patients with coronary heart disease are significantly increased, and the detection of the levels has a great significance for the diagnosis of coronary heart disease and the assessment of the severity of coronary heart disease.