ObjectiveThrough the automation, standardization and individualization of intravenous（IV）fluid batch decision-making, to realize the homogenization and high efficiency of Pharmacy Intravenous Admixture Services（PIVAS）, to promot safe and rational clinical drug use．Methods According to the pharmacology of drug use, the problems existing in manual IV fluid batch decision were investigated and analyzed, and an automatic IV fluid batch decision system was constructed based on hospital information system．Batch time division table and batch decision rules were established, automatic IV fluid batch decision system was maintained by pharmacists, the application effect of the system were evaluated and analyzed．Results The unqualified rate of PIVAS batch decreased, and the rationality of IV transfusion time increased．The time for prescription checking pharmacists to make IV fluid batch decisions was shortened, which greatly improved the work efficiency of PIVAS and nurses, and reduced the error frequency of PIVAS IV fluid distribution．Conclusions After the completion of the automatic IV fluid batch decision system, the medication time is more reasonable and the drug treatment effect is improved．The work efficiency and quality of PIVAS are significantly improved, and the unqualified rate of IV fluid batches is reduced．The IV fluid batches of patients are really arranged in a consistent way, and the rationality of medication time is improved, so that clinical medication is more reasonable and safer, and individualized treatment is realized．