Abstract: Objective To explore the value of pulmonary ultrasound dynamic monitoring in assessing volume resuscitation effect in patients with severe shock.Methods A total of 50 shock patients with volume resuscitation were selected,and left cardiac systolic function was monitored dynamically when patients lived in ICU.Serum BNP level was detected to assess whether there was heart failure,and meanwhile the CVP,serum creatinine and fluid balance were observed during the recovery period.Results In the 50 patients,41 patients were survived and 9 patients died,and a total of 360 times of bedside cardiopulmonary ultrasonic monitoring was performed.In the survived patients,the positive number of B line in lung ultrasound reached the peak value at (22.2 ± 4.7) hours,and the highest positive section number was (3.4 ± 0.9).The positive balance of fluid in death patients was large,and the number of positive sections of B line was significantly greater than that of survival group (P ＜ 0.05).Conclusion In patients with volume resuscitation,there is a phenomenon of excess capacity in the late period of volume resuscitation,and the pulmonary ultrasound dynamic monitoring in changes of B line can accurately reflect the changes of body volume.