The continuous innovation and promotion of digital technology represented by big data, cloud computing and artificial intelligence have accelerated the development of a new round of technological revolution. The new round of technological revolution presents intelligent and networked characteristics, digital economy and digital technology to empower China's economic form to digital transformation, giving rise to a number of new business forms, new models, and bringing new opportunities. However, China is still facing problems such as a large digital divide, digital security threats, difficulties in implementing digital taxes, serious non-tariff barriers, difficulties in the digital transformation of enterprises and a lack of digital talents. Therefore, relevant research on the connotation and characteristics of the digitalisation of China's economy should be strengthened to provide theoretical support for China's economic transformation and high-quality development.