Under the reformed registration system, the role of investment banks in the Initial Public Offering (IPO) business has evolved significantly from the approval system. As crucial "gatekeepers" of the capital market, these banks now bear the responsibility of thoroughly examining issuance application materials for truthfulness, accuracy, and completeness. While the IPO business promises a prosperous future for investment banks, it also presents considerable challenges. Some banks face issues such as insufficient adherence to prudent examination requirements, lax establishment or implementation of internal control systems, and the need for improved information management. To enhance their sponsorship business, it is recommended that investment banks optimize talent training, internal management control, risk management, and intelligent information system construction. Cultivating professional sponsorship talents with comprehensive skills, reinforcing ethical standards, and conducting thorough reviews of IPO companies are crucial. Furthermore, optimizing the management system, establishing effective communication mechanisms, and enhancing risk management capabilities are essential steps. Leveraging advancements in computer technology, the construction of a secure and reliable intelligent information system is advised. As the reform progresses, investment banks should bolster international exchanges, cooperation, and professional competitiveness to evolve into reputable international brand banks.