Abstract: This paper describes the dynamic evolution of China's manufacturing energy intensity and industry heterogeneity based on the Kernel density function model.In view of environmental regulation and constructs a nonlinear threshold model for green technology innovation to energy intensity.Moreover,it discusses the threshold effect and the change of time and employs multiple quantile to comprehensively analyze the effect on energy intensity.The results show that the overall development of China's manufacturing energy intensity is more convergent and the gap of the industry is expanding during the sample period.The relative price of energy, technological transformation and human capital are significantly negatively correlated with energy intensity.The increase of environmental regulation intensity promotes green technology innovation to reduce energy intensity in section ER≤0.101 and 0.101＜ER≤2.160.Industry heterogeneity exists in environmental regulation and there is a big difference in the same industry in different years.Quantile regression results show that threshold regression exaggerates the positive impact of firm size on energy intensity and only high human capital could significantly reduce energy intensity.