To clearly understand the inner link between student cadres' leadership development and effective university class management, and to solve the inefficiencies in current class work, this study uses three methods: reviewing existing research, analyzing real data, and studying specific cases. It defines what student cadres' leadership really means—including three key parts: moral guidance, ability support, and relationship coordination. It also explains what "effective class construction" involves, covering four areas: building a good learning environment, strengthening class unity, smooth management, and fostering class culture. The study deeply explores how these two aspects interact and offers practical ways to improve the current situation. Research shows that student cadres' moral leadership is the core of guiding class values; their ability leadership is the key to making class work run smoothly; and their relationship leadership is what holds the class together. Moreover, a positive cycle forms between the two: "developing leadership → practicing in class work → improving leadership further." These findings provide universities with both theoretical and practical support to enhance class construction by focusing on student cadres' growth.