Will OFDI help promote the green transition of China's economy? Our study adopts the inter-provincial panel data of China from 2011 to 2019 to explore the influence of OFDI on green economic efficiency (GEE). We find that OFDI significantly improve China's GEE, robustness tests still support this conclusion. We also find that the reverse technology spillover obtained from developed countries through OFDI promotes the growth of GEE. Heterogeneity analysis shows that, OFDI significantly promotes GEE in eastern China, however, this promotion effect is not significant in midwestern China. Besides, the promoting effect of OFDI on GEE has been further improved after 2016. This paper further finds that there exists a threshold effect of OFDI on GEE, when the financial development and human capital exceeds 2.0954 and 0.0290, respectively, the promoting effects of OFDI on GEE are greatly enhanced.