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Abstract: Bronchopulmonary dysplasia is a chronic lung disease that poses significant threats to both survival quality and long-term health of preterm infants. In some infants，impaired pulmonary vascular development leads to irreversible vascular injury and remodeling，progressing to pulmonary hypertension（PH）. BPD-associated PH（BPD-PH） not only substantially increases mortality risk during infancy and early childhood but also causes long-term cardiopulmonary dysfunction，growth retardation，and neurodevelopmental impairments . This review aims to systematically elucidate the latest definition and classification of BPD-PH， sort out the pathophysiological mechanism that involves inflammation，hypoxia and vascular dysplasia，and summarize the risk factors and prediction model associated with BPD-PH，with a particular focus on summarizing the research progress in biochemical biomarkers and imaging techniques，which is expected to provide references for early clinical identification and intervention.

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