The objective of the article is to evaluate the influence of green supply chain management on firm performance through a mediate variable which is competitive advantage and moderate variable which is supply chain integration. Research was conducted on 313 Vietnamese enterprises and the data analyzed by Smart PLS software shows that green supply chain management has a positive impact on firm performance. At the same time, competitive advantage and supply chain integration both have a statistically significant mediating and moderating role. The research results are meaningful for managers to come up with green supply chain integration policies and strategies to improve competitive advantage and firm performance.