The digital economy in the Yangtze Economic Belt has developed significantly in past 2018，with a scale of more than 12 trillion，accounting for almost half of the scale of the whole country. Digital economy has also become an important driving force for the transformation and development of the Yangtze Economic Belt. Among the 11 provinces of the Economic Belt，Jiangsu province and Zhejiang province were at the forefront of digital economy development，and Yunnan province and Guizhou province were the most backward. For the network infrastructure，the Internet access and user scale of the Economy Belt accounted for more than 40% that of the country，and Zhejiang，Jiangsu and Shanghai had the most perfect facilities. For electronic information manufacturing industry，Jiangsu province had the largest industrial scale，Guizhou and Yunnan province had a smaller scale. At the same time，the income growth rate of Shanghai，Zhejiang and other major information provinces fell more，while that of Jiangxi，Yunnan，Sichuan，Guizhou and other latecomers grew faster. For software industry and information technology service industry，the scale of Economic Belt accounted for more than 40% of the whole country，and the development of Jiangsu province was most prominent，while that of Jiangxi，Guizhou and Yunnan province was smaller. At the same time，the R & D power of software industry of Jiangsu and Zhejiang province was stronger，while Jiangxi，Guizhou and Yunnan province were weaker. For industrial integration of digital economy，the development of the Yangtze Economic Belt was at a relatively high level in the whole country，and Jiangsu province had the best development，followed by Shanghai，and Guizhou province ranked last in the Economic Belt and ranked 22nd in the country. Cloud computing industry of Shanghai grew fastest，followed by Zhejiang and Jiangsu province. According to cloud calculation，Guizhou province was last in the Economic Belt. For the development of big data industry，Jiangsu province ranked first in the Economic Belt，followed by Zhejiang province and Shanghai，while Anhui，Hunan and Yunnan province were weaker. Looking forward to 2019，we can expect that the scale of digital economy in the Yangtze Economic Belt will continue to grow，the integration of digital technology and digital industry will be further deepened，the development trend of industrial agglomeration will be more obvious，and the ecological system of digital industry will be obviously improved.