Abstract:Considering carbon tax and consumers’ low carbon consciousness, the equilibrium solutions of price,per-unit carbon emissions and profits were obtained under the decentralized supply chain and then retailer"s optimal allocation proportion were got under cost sharing and Nash bargaining model, and analyzed three situations comparatively.It shows that the equilibrium solutions of per-unit carbon emissions under cost sharing and Nash bargaining model were lower than that under the decentralized supply chain, and the equilibrium solutions of profit under cost sharing and cost-sharing under Nash bargaining model were superior to others.And the paper analyzes the influence of carbon emission reduction’s cost through numerical analysis .