Abstract: Objective: To investigate the X-ray and CT features of lung injury in acute Baicaoku poisoning. Methods: 24 cases X-ray and CT image of lung injury in acute Baicaoku poisoning were analyzed retrospectively. Results: In these 24 cases of lung injury in acute Baicaoku poisoning,6 cases patients died,in 15 cases pulmonary fibrosis is noted, in 3 cases patients recovered and to be discharged. According to periods of poisoning, the 24 cases were divided into 3 types: The early stage of poisoning (within 5 days), plain chests in alls were nothing remarkable, 18 cases showed slight ground glass changes in HRCT examinations. The middle stage of poisoning(5-14 days), plain chests showed dark linear, tripes in both middle and inferior fields, including 3 cases showed hazy in both fields, the lung showed unclear, the heart became more enlargement, and showed pulmonary interstitial fibrosis, emphysema and more dark hazy were showed in both lung fields. The late stage of poisoning: X-ray and CT found more consolidation and exudation, that showed terrible prognosis. Conclusion: The X-ray and CT examination have more predominance for the lung injury in acute Baicaoku poisoning in analysis of its found and evolved, especially the HRCT has characteristic in that could show the slight changes and pulmonary edema in early lung injury, and it is also the important gist for clinical treat.