Abstract:With the increasingly serious problem of global climate change, carbon trading has gradually become an important means of environmental protection. In carbon trading, multi-party pricing mechanism is widely used. This paper discusses the design of multi-party pricing mechanism for carbon trading based on blockchain and game theory. By using blockchain technology to record carbon trading information and smart contracts to achieve automated execution and multi-party collaboration, the mechanism can increase the transparency and credibility of carbon trading. Through the multi-party pricing mechanism based on game theory, it helps to find the optimal pricing strategy to achieve fairness and rationality in carbon trading.At the same time, it also uses machine learning and data analysis technology to predict the unit price of carbon transactions and future market trends based on historical transaction data, bringing more accurate reference suggestions to traders. In addition, this paper also designs and implements a carbon trading system based on blockchain and game theory, and verifies the availability of the optimal pricing strategy in the system.