Abstract: The decoupling trend between environmental regulation,technological innovation and the efficiency of industrial green total factor water resources is analyzed from 2002 to 2019 based on the decoupling elasticity and low-pass filtering technology,and then their equilibrium evolution relationships are tested from the aspects of existence verification,pulse and variance interpretation by VAR measurement model. The decoupling elasticity between environmental regulations,technological innovation and industrial green total factor water resource efficiency has a better development trend,but it is different from the inverted“U”relationship of the traditional Kuznets curve. Especially after filtering out the impact of high-frequency noise,environmental regulations and industrial green total factor water resource efficiency show two inverted“U”-shaped fluctuations and a period of vibration adjustment. Although there is an inverted“U”-shaped fluctuation between technological innovation and industrial green total factor water resource efficiency,it is relatively lagging compared to environmental regulations. There is a long-term co-integration relationship between environmental regulation,technological innovation and the efficiency of industrial green total factor water resources,but the co-integration mechanism of environmental regulation on technological innovation is not significant. The impact of environmental regulation on industrial green total factor water resource efficiency is better than that of technological innovation,and the positive incentive effect caused by it was more obvious. Moreover,under the trend of increasing regulatory intensity,the dependence of its green total factor water resource efficiency on technological innovation has gradually increased,but the driving effect of technological innovation should be improved. The impact of industrial green total factor water resource efficiency on environmental regulations and technological innovation will have a wavy effect in the opposite direction in the short term,but in the long run,their regulation can further release the improvement potential of industrial green total factor water resource efficiency. The key to achieving the above goal is to shorten the length of time for digesting regulatory policies and promote technological innovation to overcome the“scale investment trap”.