OBJECTIVE： To optimize prescription audit platform of PIVAS in our hospital， and to provide reference for rational drug use in pediatric department. METHODS： The records of irrational drug use and prescription comment record of physicians were collected and sorted out. Retrieved from drug instruction， China’s National Prescription Collection： Chemicals and Biological Products Volume （Children’s Edition） （2013） and other data， PIVAS prescription audit guideline of our hospital was filed. Based on it， PIVAS prescription audit platform was optimized. The efficiency and accuracy of prescription audit were evaluated using average daily medical order audit time， the number of audit pharmacists， average daily number of telephone communication with clinicians， average daily number of irrational medical orders， the detection rate of irrational medical order as indexes. RESULTS： The revised PIVAS prescription audit guideline is simple and easy to consult. After optimizing and implementing PIVAS prescription  auditor platform， average daily medical order audit time， the number of audit pharmacists， average daily number of telephone communication with clinicians， average daily number of irrational medical orders decreased by 33.33 ％， 50.00 ％， 57.89 ％， and 57.14 ％， respectively； the detection rate of irrational medical orders decreased from 1.38％ to 0.54％， with statistical significance （P＜0.05）， which indicated the efficiency and accuracy of prescription audit were improved significantly. CONCLUSIONS： The optimized PIVAS prescription audit platform can significantly improve the standardization of medical order audit and the level of rational drug use， and contribute to rational drug use in pediatric department.