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Abstract: This paper uses the Malmquist-Luenberger (ML) index based on SBM vector distance function to measure the green total factor productivity of industry of 284 prefecture-level cities in China from 2009 to 2017. Then it explores the effects the implementation of environmental regulations (IER) and the government’s technology support (GTS) on the green development of local industries by using SYS-GMM and instrumental variable method. It finds that the joint implementation of IER and GTS has a long-standing mechanism to promote the green total factor productivity (GTFP) of local industries, both enhancing the effects of IER and significantly increasing the impact of GTS. This conclusion is still robust after multiple tests such as endogeneity treatment and replacement of core measurement indicators. The synergy effect is reached through energy conservation, emission reduction and improvement of product technology. Further analysis of heterogeneity shows that the synergy of GTS and IER is more obvious in coastal areas, provincial capital cities, and non-resource-based cities. From 2012 to 2016, the synergy effect is relatively stronger. The cities with low quantile and high quantile of the GTFP level, the synergy effect of GTS and IER is relatively weak. This paper verifies the positive influence of the incentive-restraint mechanism of GTS and IER on local industrial GTFP, and provides a useful reference for promoting China’s industrial green development.

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