The Study On Carbon Tax Policy Under Low-carbon Economy

China has been the largest emitter of carbon dioxide in the world instead of America since 2008. At the same time, the government of China declares that carbon dioxide emissions will be reduced by 40%-50% than 2005 till 2020. Under this background, China has to implement politically feasible and economically effective policy to support low carbon economy with low energy consumption and low pollution. Compared with other policies, carbon tax performs better on reducing environment stress and improving economic efficiency. It’s a hard task and will take long time to establish efficient carbon trading market, especially for developing countries like China. Comparatively speaking, carbon tax is better on operability. Therefore, it has important theoretical value and guiding significance to study carbon tax comprehensively.First, by producers and consumers shared principle, we use multi-objective input-output model to simulate the optimal carbon tax value with the objective of protecting environment and controlling economic loss. At the same time, we analyze the effects of carbon tax on carbon emissions, output and fossil energy consumption. Then, based on the theories of induced invention and technology-push invention, the impacts of carbon tax on low-carbon technological innovation and lagged years are studied. At last, we measure the level of coordinated development of regional economy of the whole country, eastern region, central region, western region and northeastern region considering that macro policy will hinder the regional economic coordinated development.The results show that carbon tax can reduce carbon dioxide emissions. Also, tax rate and fossil fuel consumption reduction are positively correlated. Carbon taxes can significantly reduce the level of coordinated development of regional economy, but, enhancing the spatial arrangement of the population and promoting regional trade can weaken the negative impact of carbon tax. Carbon tax policy has the most obvious effect on low-carbon technological innovation, and there are obvious differences in the effects of policies in integrated economic areas.