Objective To explore the diagnostic and differential diagnostic value of spiral CT in traumatic wet lung.Methods CT features of traumatic wet lung in 60 cases were retrospectively analyzed and summarized. Results CT features of wet lung included 4 types:(1)the interstitial type in 10 cases,appeared as thicknees and blurring of the shadow of pulmonary blood vessels;(2)the disseminated consolidation type in 15 cases appeared as scattered mottling or small patch foci with slight high density in pulmonary parenchyma;(3)the mist type in 20 cases appeared as slight high density with ground-glass like cloudy shadow;(4)the type of segmental consolidation in 15 cases appeared as high dense foci with large patch in segmental distribution.Conclusion Spiral CT can well detect the site, type, extent of traumatic wet lung and other injury. It is the most optimal means at present for traumatic wet lung.