Teamwork is arguably a major aspect of university teaching as it gives students opportunities to apply their expertise to problem-solving skills, and to sharpen their skills for future jobs; to improve study outcomes, motivation, and attitudes toward learning. In addition, Emotion Intelligence (EI) and knowledge-sharing are said to have an impact on group work results. The goal of this study is to investigate the relationship between EI, knowledge-sharing, and group work results of university students. The research team conducted a survey that involved 372 students from universities majoring in economics in Hanoi, Vietnam. Research results confirm that EI has a positive effect on students' knowledge-sharing skills and group work results, and knowledge-sharing is the mediator in the relationship between EI and the performance of the group.