Objective To evaluate the association between the use of antibacterial agents in the first years of life and childhood asthma. Methods The Chinese and English databases CNKI, Wanfang Data, VIP, Pub Med, and EBSCO were searched for prospective cohort studies on the association between the use of antibacterial agents in the first years of life and childhood asthma. Stata12.0 software was used to analyze the association through a Meta analysis. Results The articles with a high quality score and adjusted effect...