【】Objective: To evaluate the value of bedside pulmonary ultrasound in evaluating pulmonary edema in patients with ARDS and guiding lung therapy in the treatment of patients with acute respiratory distress syndrome (ARDS). Methods: The clinical data of 60 patients with ARDS admitted to the Department of Critical Care Medicine, Shanghai Seventh People"s Hospital were collected and randomly divided into two groups: pulmonary ultrasound group and control group, with 30 patients in each group. The patient"s gender, age, and etiology were collected. The data of the patient"s admission and the 7th day were recorded. APACHE II score, SOFA score WBC, CRP, PCT, extravascular lung water index, oxygenation index, central venous pressure, mechanical ventilation At the time, the pulmonary ultrasound group collected pulmonary ultrasound scores, 7-day improvement rate, ICU hospitalization time, and 28-day mortality in both groups. Study: The value of pulmonary ultrasound in assessing the severity of the patient"s condition, the duration of the treatment, predicting the prognosis, and the correlation between the pulmonary ultrasound score and the extravascular lung water index. Results: 1 There was no significant difference in APACHE II score, SOFA score, oxygenation index, extravascular lung water index, WBC, CRP and PCT between the two groups before treatment (P>0.05). After 7 days of treatment, both groups of patients were treated after treatment. There was improvement, the improvement of the pulmonary ultrasound group was more obvious, and the mechanical ventilation time was shorter (P<0.05). There was no significant difference in the pre-treatment central venous pressure (CVP) between the two groups. There was no significant difference in CVP between the two groups after 7 days of treatment (P>0.05). The improvement rate of the 7-day ultrasound in the pulmonary ultrasound group was higher than that in the control group. Compared with the control group, the 28-day mortality in the pulmonary ultrasound group was lower than that in the control group (P<0.05). 4 The extravascular lung water index of all patients before and after treatment was positively correlated with APACHE II score, extravascular lung water index and central venous pressure, and negatively correlated with oxygenation index. 5 Pulmonary ultrasound scores in the pulmonary ultrasound group were positively correlated with APACHE II score, SOFA score, and extravascular lung water index. Pulmonary ultrasound score was positively correlated with central venous pressure, and pulmonary ultrasound score was negatively correlated with oxygenation index. Conclusion: Pulmonary ultrasound can effectively assess the severity of patients in patients with acute respiratory distress syndrome, guide individualized treatment of patients with ARDS, and predict the prognosis of patients. It can be used as a routine diagnosis and treatment method for patients with ARDS in intensive care unit.