In order to implement the requirements of the General Office of the National Health Commission in the Notice on Improving the Diagnosis and treatment Ability of Bacterial and fungal Infections in secondary and above general Hospitals (Medical Letter [2016] 1281) and the Notice on Continuously doing a good job in the Clinical application Management of Antibacterial Drugs (medical Letter [2019] 12), In order to improve the diagnosis of infectious diseases and rational application of antibiotics in northeast Sichuan province. On January 10, 2023, "2022 Communication Class on Diagnosis and Treatment of Nosocomial Infection in Sichuan Province" was held online. The meeting invited experts from Suining Central Hospital, Guangyuan Medical Hospital and Langzhong Medical Hospital to give lectures, which played an active role in improving the diagnosis of infectious diseases and rational application of antibiotics in primary medical institutions in northeast Sichuan.