Objective: To explore the effect of clinical pharmacists participating in the clinical pharmacy work in neurosurgery de-partment and the influence on the rational drug use index. Methods: A retrospective analysis on the monthly drug proportion, antibac-terial drug utilization rate and intensity, and the other indicators before and after the intervention performed by clinical pharmacists in neurosurgery department was carried out, and the consumption sum, DDDs and medical records were statistically analyzed in April and June 2017. Results: After the intervention, the proportion of medicine, hospital days per capita, use rate and intensity of antimicrobial drugs, and the other rational drug use indices were significantly improved in neurosurgery department, and the differences in the indi-ces before and after the intervention were significant (P<0. 01). Conclusion: Consultation practice of clinical pharmacists in neuro-surgery department can effectively assist and guide the clinical treatment and improve the level of rational drug use.