Since the reform and opening up, China has maintained rapid economic growth for nearly 40 years, and is the country with the fastest economic growth in the world. However, the rapid economic growth has also paid a huge social price, which is directly related to the unreasonable economic structure and extensive growth mode. Traditional engines of economic growth began to fade. This paper through the analysis to the theory of ancient and modern Chinese and foreign economists study on economic growth: economic growth is an extremely complex process, many factors influence the economic growth, correctly grasp the role of these factors in economic growth, to grasp the law of economic growth, the correct understanding of modern economic growth is very important. Sustained economic growth in China, on the basis of dynamic analysis, combined with the current economic situation at home and abroad, as you can see, in the high-speed economic growth since reform, various factors have been attenuation or mutation, the major developed countries and regions for the adjustment of the external imbalance in pressure, the depth of the global economic growth and recovery of the factors of uncertainty, It is difficult to maintain and improve the driving force and source of China’s economic growth in the future. The current industrialization process has reached a historical and international high level and is nearing the end. The growth rate of industrial investment will slow down significantly in the future. The demographic dividend is gradually depleting, and the savings rate will gradually decrease in the future. The era of rapid economic growth brought by demographic dividend and high savings rate in a long period of time will change. Therefore, based on the perspective of supply side demand and the development of new industries, the paper analyzes the driving force of traditional economic growth in China in the past, and holds that the driving force of consumption upgrading and digital economy are the important driving force of economic growth, and strives to improve the consumption structure of residents, increase the consumption rate and vigorously develop digital economy. Shifting China’s economic growth from relying on external demand to relying on domestic demand will provide strong support for high-quality development.

Ⅰ. Introduction
Ⅱ. Consumption Upgrading Power
Ⅲ. Digital Economy Dynamics
    1. Improve User Coverage and Drive Development with the Digital Economy
    2. Reference Development Strategy and Cultivate Key Direction
    3. Protecting Intellectual Property Rights and Promoting Innovation
    4. Learn from the Development Policies of Advanced Countries and Promoting theReal Economy
    5. Promote the Development of the Industrial Internet. Promote industrial Digitization
Ⅳ. Conclusion
Reference
ABSTRACT

• Feng Zhen(Feng Zhen, Lecturer, Business School, Shandong Jianzhu University, China.)
• Zhang Mingming(Zhang Mingming, Lecturer, School of Foreign Studies, Hebei Normal University, China.) Corresponding Author
• Fan Xingzuo(Fan Xingzuo, Lecturer, Department of Economic Management, Langfang Normal University, China)