Abstract: Based on the CH model, this paper measures the environmentally-constrained level of green technology innovation in 11 provinces and cities in the Yangtze River Economic Belt from 2003 to 2016, and investigates the foreign direct investment reverse technology by using the system generalized moment estimation method which can effectively control endogeneity problems. The impact of spillovers, market segmentation and other factors on regional green technology innovations revealed that:First, Chinese enterprises' outward direct investment reverse technology spillovers can significantly improve green technology innovation, but market segmentation indirectly hinders green by distorting transaction costs in the local market. The improvement of the level of technological innovation; secondly, when considering the role of market segmentation, the impact of Chinese technology on foreign direct investment reverse technology spillovers on the absorption capacity of technology has a certain degree of uncertainty; third, from a regional perspective, downstream productivity The improvement is mainly due to the reverse technology spillover effect of Chinese enterprises' foreign direct investment, while the middle and upper reaches rely on market segmentation to a greater extent; and in the case of inter-regional differential market segmentation, Chinese enterprises are externally Direct investment for China

Key words: foreign direct investment, reverse technology spillover, green technology innovation, Yangtze River Economic Belt