Under the complex and ever-changing global economic situation, the sales of new energy vehicles in China are facing many development opportunities and practical challenges. Market demand and policy environment impact the development of China's new energy vehicle industry. This research takes the new energy vehicle industry in China as the research object, adopts a combination of literature review and case analysis methods by combing and analyzing relevant literature, combined with practical cases, deeply discusses the development status and problems of China's new energy vehicle industry, and proposes improvement suggestions from two dimensions: market demand and policy environment. Research shows that insufficient market demand, insufficient technological innovation, and an unstable policy environment are the main factors that restrict industrial development. To solve these problems, measures need to be taken, such as increasing government support, enhancing technological innovation capabilities, and promoting reforms and innovations in marketing and other aspects, aiming to inspire China's new energy vehicle industry to go global.