Abstract: The capandtrade policy and the carbon tax policy are two typical carbon emission policies of the government. The effectiveness of carbon emission control policies is investigated based on investment differentiation of green technology level.A supply chain system consisting of a single supplier and a single manufacturer is established according to the correlation characteristics between market potential demand and carbon emission trading prices. This paper solves the investment， profit， consumer surplus and total carbon emissions of manufacturers in different models， and further compares and analyzes the above results.The correlation coefficient between market potential and carbon trading price significantly affects the scope of application of carbon emission policies. When the correlation coefficient is moderate， compared to capandtrade policy， carbon tax policy can increase manufacturers investment motivation and profits， increase consumer surplus， and reduce total carbon emissions. Further research has shown that when manufacturer purchases from supplier with high technical foundation， the capandtrade policy has greater advantages in investment and total carbon emissions compared to purchasing from supplier with low technological foundations; when manufacturer purchases from supplier with low technological foundations， the capandtrade policy has a greater advantage in profit compared to purchasing from suppliers with high technological foundations.

Key words: carbon emission; carbon emission policies; suppliers investment

摘要： 限额交易政策和碳税政策是政府采取的两种典型的碳排放治理政策。为研究投资差异化绿色技术水平的碳排放治理政策效果，针对市场潜在需求与碳交易价格间的相关性特征，建立单供应商和单制造商组成的供应链系统，求解不同模型中制造商的投资、利润、消费者剩余和碳排放总量，并对比分析。市场潜力和碳交易价格的相关系数显著影响碳排放治理政策的适用范围。当相关系数适中时，与限额交易政策相比，碳税政策可使制造商的投资动机更大、利润更高、消费者剩余更多、碳排放总量更少。进一步研究表明，制造商向技术基础高的供应商采购时，限额交易政策在投资和碳排放总量方面比向技术基础薄弱的供应商采购时有更大优势；制造商向技术基础薄弱的供应商采购时，限额交易政策在利润方面比向技术基础高的供应商采购时有更大优势。

关键词: 碳排放；碳排放治理政策；投资供应商