Objective: To evaluate the existing literature by comparing long-term survival between patients who underwent prophylactic thoracic duct ligation (PLG) and non-prophylactic thoracic duct ligation (NPLG) during esophagectomy for esophageal cancer, a meta-analysis of relevant studies was conducted.Background: The effect of PLG and NPLG on the long-term survival in patients undergoing esophagectomy for treatment of esophageal cancer has not been established.Methods: All articles searches were performed in PubMed, Cochrane, Embase, and Web of Science, and the deadline is August 31, 2020. The search terms included esophagectomy AND thoracic duct. The selected articles compared the long-term survival of patients undergoing esophagectomy to treat esophageal cancer with prophylactic thoracic duct ligation (PLG) and non-prophylactic thoracic duct ligation (NPLG). The I2 test and X2 test were used to determine statistical heterogeneity. Publication bias was assessed using the Egger test. The results are presented as hazard ratios (HRs) with 95% confidence intervals (CIs). All data analysis was performed using Stata12.0 software.Result: A total of 4418 patients from eight studies were included in this meta-analysis. Pooled analysis revealed that a high overall survival (OS) was significantly associated with NPLG (HR=0.81, 95% CI: 0.74-0.88, P<.001), while the recurrence- free survival (RFS) and disease-free survival (DFS) were not significantly different (HR=1.02, 95% CI: 0.71-1.45, P<.001). There was no statistical difference in long-term survival among patients with different stages of esophageal cancer, while patients who underwent esophagectomy after 2019 had a better long-term prognosis (HR=0.57, 95% CI: 0.57-0.79). In addition, there was no significant difference in prognosis and survival between patients in Japan and China based on regional analysis.Conclusions: Our meta-analysis showed that NPLG was associated with better long-term survival. Thus, we should preserve the thoracic duct during esophageal cancer surgery.