Abstract: In the era of big data e-commerce, data trading can enable collaborative sharing and value utilization of isolated data resources. As the main form of data trading in e-commerce business, marketing tags have enormous potential value. However, the traditional data trading market faces three main problems: 1) The opaque information of the centralized platform leads to trust crisis and malicious bidding ranking; 2) Lack of reasonable incentive mechanism to break the data island leads to data non-circulation and sharing difficulties; 3) Data security threats lead to privacy disclosure and data reselling and theft. In order to solve these problems, a blockchain marketing label trading mechanism for e-commerce alliance is designed, and the upper consensus incentive mechanism is designed based on decentralization, and all data transactions and computing businesses of the system are completed in combination with the trusted execution environment, thus realizing a safe and complete data transaction ecosystem. The authenticity verification mechanism is designed to ensure the effectiveness of marketing labels, the consensus incentive mechanism is designed to enable users to actively share data, and the smart contract is used to effectively constrain the role behavior according to the system design specification; Then key transmission and data security storage are realized through SGX remote authentication, and smart contract security call is realized to ensure user privacy and data security; Finally, the reliable delivery of data transaction results is realized through the trusted computer system and system design idea. In order to verify the security and practicability of the system, 350000 pieces of real data provided by an e-commerce company are used for performance testing. The test results show that the system can guarantee the security and performance requirements at the same time, and its additional costs mainly come from the remote authentication module and are within the acceptable range.