Abstract: Objective：To explore the clinical features,diagnosis and treatment of acute lung injury induced by ammonia inhalation for providing the help of disease assessment,prognosis and follow-up.Methods：Thirty-two cases with acute lung injury induced by ammonia inhalation were treated with oxygen inhalation and keeping the unobstructed of respiratory tract.Three cases with laryngeal obstruction were tracheotomied.In acute stage,glucocorticoid,prevention of infection,nutrition support and symptomatic treatment were applied.Results：Thirty-two cases were treated successfully.Eight cases appeared slight pulmonary fibrosis after 6 months of follow-up.Conclusions：The results of the bronchoscopy are important for disease assessment and prognosis of acute lung injury induced by ammonia inhalation.The early application of corticosteroids,preventing secondary infection,the full atomization to promote expectoration and timely tracheostomy to maintain airway patency are the keys to ensure successful treatment.