This study focuses on China's mutual fund market and analyzes the impact of fund managers' past experience on their performance. The research results show that fund managers with management experience, including those who have held senior management positions, can significantly improve performance. This may be due to their excellent team coordination, strategic planning, and decision-making abilities. In contrast, managers with professional technical or accounting backgrounds may reduce performance, possibly because they rely too much on past investment experience, lack decision-making flexibility, and are unfamiliar with corporate management. For management-type fund managers, the postgraduate education of the fund manager and the number of award-winning funds of the fund company have a positive moderating effect on performance. However, factors such as the number of funds managed, the amount of assets under management, the number of managers and employees in the fund company, and the amount of newly issued funds may have a negative impact. These findings provide valuable references for fund managers and fund companies in improving performance, and have important implications in various aspects such as selecting fund managers, setting investment strategies, and managing the number and size of funds.