With the rapid development of digital technology, China's digital economy is facing unprecedented opportunities and challenges for growth. This paper explores the challenges in four key areas of data security, digital divide, market monopoly and innovation, technology dependence and talent gap in China, and puts forward corresponding countermeasures and suggestions. In terms of data security and privacy protection, the importance of improving the legal system, enhancing technological protection capabilities, enhancing public awareness and corporate responsibility was emphasized. To address the digital divide, a comprehensive solution was proposed to strengthen infrastructure construction, provide customized education and training, and encourage public-private cooperation. In response to the challenges of market monopoly and innovation, it is suggested to strengthen market supervision, support the development of small and medium-sized enterprises and establish an innovation incentive mechanism. In terms of technology independent research and development and personnel training, it puts forward strategies to increase investment in key technologies, improve the education system, attract international talents and promote industry-university-research cooperation. The paper concludes that by implementing these countermeasures, China can not only solve the current problems it faces, but also occupy a more important position in the global digital economic landscape. These analyses and recommendations provide valuable insights for policymakers and have important practical significance for promoting the healthy development of China's digital economy.