With the rapid development of e-commerce, the transaction mode of the second-hand housing market is undergoing profound changes. The traditional second-hand housing transaction has problems such as information asymmetry, low transaction efficiency and poor transparency, which not only affects the healthy development of the market, but also restricts consumers’ choices. In this paper, an e-commerce platform for second-hand housing transactions based on blockchain technology is constructed, and its application effect in enhancing transaction efficiency and transparency is deeply analyzed. By using Max DEA software, the study compares and analyzes the changes in transaction efficiency of two companies between 2021 and 2024 after the application of the traditional transaction model and the e-commerce platform. The results show that the transaction efficiency of the enterprises after the application of the e-commerce platform is significantly improved, with a comprehensive efficiency of 0.882 in 2024, which is a significant increase from 0.693 in 2021. In addition, the e-commerce platform also improves the transparency of the transaction through the decentralized characteristics of the blockchain, so that the symmetry and data completeness of the housing information are improved from 3.57 and 3.27 to 4.37 and 4.25, respectively.The research in this paper shows that the second-hand housing transaction model based on the ecommerce platform can effectively improve the efficiency of the transaction and the transparency of the information, and provide consumers with a safer and more transparent transaction environment, and promote the healthy development of the market.
