Objective To investigate the security and feasibility of silk ligating for pulmonary artery in video-assisted thoracoscopic lobectomy, and to summarize the clinical skills. Methods We retrospectively analyzed the clinical data of 68 patients underwent the video-assisted thoracoscopic lobectomy from April 2013 to March 2015. There were 49 males and 19 females with the mean age of 59.6±10.3 years, ranging from 38 to 76 years. We divided the patients into an ECR60W cut-up group (31 patients) and a silk ligation group (37 patients). There were 22 males and 9 females patients with the average age of 59.3±9.9 years with ECR60W. There were 27 males and 10 females patients with the average age of 59.9±10.5 years with silk ligation. We observed the effect of hemostasis, and analyzed the amount of bleeding loss during operation, postoperative suction drainage and the cost of operation material between the two groups. Results There were 4 patients out of 68 converted to the open lobectomy, and all of them used ECR60W. The application of silk ligation for pulmo-nary artery could effectively control bleeding loss and avoid massive amount of bleeding due to the vascular tear in opera-tions. Furthermore, the application can reduce the rate of severe complications such as massive bleeding resulting from postoperative silk ligation slippage. There was a statistical difference between the two groups on the cost of operation mate-rials (P < 0.01). Conclusions Silk ligation for pulmonary artery in video-assisted thoracoscopic lobectomy is simple and prac-tical to apply. Compared with the ECR60W, it can significantly reduce the cost of operation material. It's worth to popularize in clinic.