Drug-induced interstitial lung disease(DI-ILD)is the most common form of drug-induced pulmonary adverse events,with antican-cer drugs being the primary cause.DI-ILD first gained attention as a notable adverse event due to the use of antibody-drug conjugates(ADC).As the development of drugs,particularly ADCs,continues to expand and more ADCs are approved or nearing approved for clinical use,DI-ILD has become an area of growing concern.However,the mechanisms by which ADCs induce ILD remain unclear.This article reviews the mechanisms of DI-ILD in the most commonly used ADCs targeting human epidermal growth factor receptor 2(HER2).