This paper established an equilibrium model including representative household,government and eight industries,and two such different environmental policy tools as carbon intensity and carbon cap are added into the model.The paper points out that the carbon intensity policy imposed on major high-emission industries achieved double dividend of environmental quality improvement and sustainable economic growth under the condition of proper constraint target.This result supports environmental Porter hypothesis.This paper finds out that double dividend due to the fact that environmental governance policy leads to rising price of resources and demand of labors,which results in an effective redistribution of production factors among industries and sustainable economic growth.Furthermore,the paper estimates the marginal effect on carbon emission and carbon intensity of economic structure and provides targeted suggestions.