Venous malformations(VMs) are the most common vascular developmental anomalies. There are many controversies over VMs in Chinese clinical medical practice. Experts on the panel from vascular-anomaly centers in China reviewed the etiology, pathophysiology, epidemiology, classification, clinical presentations, diagnosis, and treatment of VMs. The aim of this consensus document is to provide recommendations for, and assist clinicians and patients in, the diagnosis and treatment of VMs.