The big data transaction has effectively promoted the circulation of data and its value，which releases the value and dividends of the big data. The report reviews the background and status of big data transaction market，and believes that China's big data transaction industry wholly has entered into the transforming stage through 2017～2018.Based on the analysis of the characteristics，development difficulties and competitive strategies of the current big data transaction market，the report prospects the future development of big data transaction from perspectives of policy，technology，industry and so on.The paper believes that the conditions for promoting the development of big data transactions should be within the framework of the overall industrial ecological construction of big data. It is necessary to fully consider the direction of policy leadership as well as the needs of reality integrating the various factors of data，capital，technology，manpower，etc.，in order to achieve long-term development.