Objective: To analyze the efficiency of Quality Control Circle (QCC) activities in reducing dispensing errors of pharmacy intravenous admixture services (PIVAS) in hospitals and to provide a reference for ensuring the medication safety of patients. Methods: Using QCC technique to collect and analyze the types and causes of errors in data. Through a series of activity steps, such as Plan(P), Doing(D), Check(C) and Action(A), the difference of dispensing error data before and after the activity were compared, and the magnitude of the improvement after the activity was calculated. Results: Through the development of QCC activities, the dispensing error was reduced from the original 63 cases/month to 27 cases/month; the target achievement rate was 133.33%, which improved the problem solving ability and sense of responsibility of each circle member and improved the PIVAS operating procedures. Conclusion: By carrying out QCC activities, standardized operating procedures have been formed, which can reduce dispensing errors, so the work efficiency and the quality of pharmaceutical service are improved.