Objective:To investigate the features of pleural effusion caused by chronic congested heart failure. Methods:The heart ultrasound results and the nature of pleural effusion of 32 cases of patients with chronic congestive heart failure complicated by pleural effusion were analyzed. Results:The heart function that the subjects with pleural effusion caused by chronic congested heart failure was worse. The feature of pleural effusion was not always transudate. The property of pleural effusion may be correlated with the period of pleural effusion existing. Conclusion:Fully aware of congestive heart failure with clinical features of pleural effusion can reduce the patient's misdiagnosis and wrong administration 。