【摘要】 目的 了解外科围手术期预防性使用抗菌药物现状，评估其用药合理性。 方法 随机抽取2009年1-12月265例外科手术患者病历，根据《抗菌药物临床应用指导原则》和《卫生部办公厅关于抗菌药物临床应用管理有关问题的通知》对抗菌药物使用进行合理性评价。 结果 265例外科手术患者均使用了抗菌药物，使用率为100%，外科围手术期预防用抗菌药物不合理率为63.89%，存在的主要问题是用药指征过宽、起点过高、手术前预防用药时间不当、术后预防用药时间过长及盲目联合用药。 结论 外科围手术期抗菌药物预防性使用不合理现象突出，应积极开展合理使用抗菌药物培训，加强抗菌药物使用管理，规范围手术期抗菌药物的使用，从而提高外科围手术期抗菌药物使用合理性。【Abstract】 Objective To know the status of prophylactic use of antimicrobial agents in perioperative patients, and to evaluate the medication rationality. Methods The medical records of 265 patients who underwent the surgeries from January to December 2009 were randomly extracted, and the medication rationality was evaluated according to "Guiding Principles of Clinical Use of Antibiotics" and "Notice of Medical Department Office about Antibiotics Clinical practice Management Related Questions". Results All of the 265 perioperative patients were treated with antimicrobial drugs with a utilization rate of 100.00%, and the unreasonable rate of perioperative prophylactic use of antimicrobial agents was 63.89%. The main reasons included over-extended medication indications, high starting points, inappropriate time points of prophylactic medication, long duration of prophylactic medication and unreasonable drug combination. Conclusion The perioperative prophylactic use of antimicrobial agents is clinically unreasonable. It is necessary to carry out training on the rational use of antimicrobial agents to enhance the management of antimicrobial drug use and regulate the use of antimicrobial agents in perioperation.