Abstract: Interstitial lung abnormalities (ILAs) are non-specific interstitial changes incidentally found on CT scans, mainly presenting as ground-glass opacities, reticular structures, or traction bronchiectasis. With the popularization of chest imaging techniques and the aging of the population, the detection rate of ILAs has significantly increased. It is positively correlated with age and smoking, has the risk of progression, and affects patients' health in various ways. Some ILAs may progress to interstitial lung disease (ILD) or be accompanied by a decline in lung function. However, there are still deficiencies and controversies in people's understanding of its diagnostic criteria, occurrence mechanism, evaluation, and management. This article systematically reviews the key progress in ILAs research in recent years.