Abstract: Under the background of low-carbon economy, this paper focuses on a two-tier supply chain composed of suppliers and manufacturers, and explores the influence of blockchain technology on low-carbon technology sharing. Three differential game models were constructed, including no blockchain technology and no low-carbon technology sharing, no blockchain technology but with low-carbon technology sharing, and blockchain technology with low-carbon technology sharing. Comparative analysis reveals that after the introduction of blockchain technology, the carbon emission curve and low-carbon technology sharing level of the supply chain are higher than the level without blockchain technology. Furthermore, the introduction of blockchain technology significantly enhances the efforts of suppliers and manufacturers in emissions reduction and low-carbon technology sharing. The study also suggests that when suppliers need to provide low-carbon technology sharing subsidies to manufacturers, the profit distribution ratio within the collaborative innovation system for suppliers should not be less than one-third. This study provides a solid theoretical basis for decision-making in low-carbon technology sharing for suppliers and manufacturers.

Key words: Blockchain, Supply chain emissions reduction, Low-carbon technology sharing, Differential game