Abstract:〔Abstract〕 Objective To investigate the diagnostic value of combined detection of serum ferritin (SF), gamma glutamyl transferase (GGT), adenosine deaminase (ADA) and 5-nucleotidase (5-NT) in primary liver cancer (PHC). Methods 51 cases of patients with PHC who were admitted to the Second People's Hospital of Zhengzhou from June 2018 to October 2020 were selected as the PHC group, and 48 cases of patients with cirrhosis who were admitted during the same period were included in the benign group. The levels of serum SF, GGT, ADA and 5-NT were compared between the two groups, and the positive detection rates of SF, GGT, ADA, 5-NT and combined detection were compared between the two groups. Results The levels of serum SF, GGT, ADA and 5-NT in PHC group were higher than those in benign group, and the differences were statistically significant (P < 0.05). The positive detection rates of serum SF, GGT, ADA, 5-NT and their combined detection in the PHC group were higher than those in the benign group, and the differences were statistically significant (P < 0.05). Conclusion The combined detection of serum SF, GGT, ADA and 5-NT has high clinical application value in the differential diagnosis of PHC. The severity of patients' disease can be judged according to the changes in the level of each indicator, which can better make up for the deficiencies of single detection. Therefore, the combined detection of each indicator can provide a more reliable basis for clinical diagnosis and treatment plan.