Objective Acute lung injury(ALI) and acute respiratory distress syndrome(ARDS) are common disease with high mortality and greatly threaten patients' health.The earlier symptoms of ARDS reflect,the permeability between pulmonary capillary endothelial cell and alveolar epithelium barrier is increased,and both lung alveolar and interstitium are filled with massive edema fluid,which is rich in protein and a variety of inflammatory cells.At present,as the effective and safe means of prevention and treatm...