Aiming at the problems of false information flooding, lack of supervision over the whole transaction process and serious breach of contract existing in the current vehicle-freight matching platform, this study applies blockchain technology to the vehicle-freight matching platform, designs the framework and corresponding mechanism of the vehicle-freight matching platform based on public block chain, and simulates the two sides on the vehicle-freight matching platform with block chain technology with actual data. The whole process of the transaction and the conclusion of the transaction are analyzed. The results show that block chain technology can enhance the credibility of transaction information on the platform, effectively supervise the whole process of transaction execution in real time, indirectly reduce the default behavior of both sides, make up for the shortcomings faced by the vehicle and freight matching platform, and ensure the smooth progress of both sides'transactions.