Objective: To analyze the monitoring indicators of antibacterial drugs usage in hospitalized patients,and to evaluate the rationality of antimicrobial drug usage so as to standardize the clinical application of antibacterial drugs. Methods: With the help of PASS clinical pharmacy management system, the medical records of all inpatients from 2018 to 2019 were extracted for analyzing the monitoring indicators （including the usage rate and intensity of antibacterial drugs, the preventive usage rate of antibacterial drugs in type I incision surgery and the rate of microbial detection） and rational use of antibacterial drugs. Results: Among the 12 335 inpatients' medical records, the utilization rate and intensity of antibacterial drugs decreased year by year.The proportion of antibacterial drugs used for the prevention of type I incision surgery also decreased, but the rate of microbial examination of each specimen increased year by year. The review results showed that there were many reasons for the unreasonable usage of antibacterial drugs, including inappropriate usage and dosage of antibacterial drugs and inappropriate selection of antibacterial drugs, followed by a long course of preventive medication of antibacterial drugs, inappropriate timing of preventive medication, as well as inappropriate combination of antibacterial drugs. Conclusion: The hospital should strengthen the supervision of the usage of antibacterial drugs to promote the rational usage of antibiotics in clinic.