This report has assessed the big data development situations of 31 provinces，municipalities and autonomous regions of China in 2017，which is conducted on the basis of revision of the Big Data Development Index 2.0，and then compared the results with those in 2016. The results have found an increase in the scores of different regions for the index to varying degrees but a still obvious disparity among different provinces. The eastern region has displayed outstanding advantages in big data development，and Guangdong and Beijing still rank the top two；the western region has presented a significant internal disparity，and includes Guizhou and Chongqing that rank among the top 10，Ningxia that has risen the fastest by ranking，and some regions that lag behind in the ranking；and the central region and the northeast region have performed relatively poor，and presented a medium and low-level equilibrium. The regional development of big data has tended to gradually evolve from one-way dominance to balance.