The construction of data factor market is an important breakthrough in Chinese factor theory and the promotion of data transaction is a key measure to bring the market mechanism into play. With the vigorous development of digital economy，the mining of data value has been paid more and more attention. Although the construction of data factor market has not been proposed for a long time，many provinces and cities such as Guizhou，Shanghai，Zhejiang，Hubei and Henan have explored the construction of data factor market，and Sichuan has also taken the step of data factor market construction. On the basis of the continuous deepening of the understanding of data elements，the transaction of data elements has also changed from the underlying data to value-added services，the enhancement of the value density of transaction data，the improvement of the automation level of data transaction，and the attention paid to data security. To promote the construction of data element trading market in Sichuan，on the basis of ensuring data security and combining with the development trend of data element trading market，it is necessary to explore from the aspects of perfecting supporting standard system，innovating trading circulation mode and creating data circulation ecology，so as to improve data trading system through reform and innovation，ensure data circulation through technological innovation，and continuously improve the construction level of data trading market.