Abstract: Objective: To analyze the unreasonable medical service on the pharmacy intravenous admixture service in tumor pharmacy,and provide references for clinical rational drug use.Methods: The unreasonable medical services were summarized and analyzed by pharmacist from January 2011 to December 2013.Results: The most unreasonable medical service was improper solvent type(28.96%),the improper solvent volume and administration were 31.59% and 18.42%,respectively.The highest success rate of intervention was about 95.28%.Conclusions: Pharmacists strictly examining medical orders using pharmacy knowledge can adjust the irrational drug use and improve the level of clinical drug use.