OBJECTIVE:To evaluate the prophylactic use of antibiotics in perioperative period in our hospital. METHODS:The prophylactic use of antibiotics in 841 patients in our hospital in the first 3 months was analyzed statistically. RESULTS:841 patients have used antibiotics,and 74.04% of those patients with typeⅠ incision operation used antibiotics for 3 to 7 days. Cephalosporins and Fluoroquinolones were predominantly used for prophylactic purpose. Irrational use of antibiotics was seen in 714 cases. CONCLUSION:The prophylactic use of antibiotics in our hospital is far from rational,thus it is necessary to put "Guideline on Clinical Use of Antimicrobials" into practice.