Objective To analyze the irrational prescriptions, improvement measures and improvement effect in our hospital in 2016. Methods 7200 outpatient and emergency prescriptions of our hospital in 2016 were randomly selected to study. 3600 prescriptions from January 2016 to June were selected as pre intervention group, and 3600 prescriptions from July 2016 to December were selected as post intervention group,First of all, the prescription of the pre intervention group was reviewed, according to the results of the review and literature review to determine the intervention measures. The types of prescription drugs, average amount of prescription, rate of antibiotic use and unreasonable prescription rate of two groups were observed. Results Types of prescription drugs(2.27 kinds vs. 1.93 kinds), average amount of prescription(171.74 yuan vs. 152.86 yuan), rate of antibiotic use(34.39% vs. 25.47%) and unreasonable prescription rate (9.36% vs. 2.14%)of post intervention group were significantly lower than those of pre intervention group(P<0.05). Conclusion The prescription comment and targeted intervention can reduce the incidence of irrational drug use and promote rational drug use in clinic, which has important clinical value.