In order to explore the range of visible green indexes suitable for college students’ psychological recovery, and to promote the research of indoor restorative environment design in colleges and universities. A virtual experiment was used to measure and evaluate the recovery benefi ts of 44 college students viewing pictures of classroom scenes with fi ve visible green indexes (0, 5%, 15%, 25%, and 35%). The results showed that the psychological recovery benefi ts for college students were signifi cantly increased after introducing green plants into classrooms that previously had none. In classrooms with an upper limit of 35% visible green index, 25% ～ 35% visible green index may be most benefi cial to the psychological recovery of college students. In addition, the psychological recovery benefi t of the master’s and doctoral student groups in the classroom scene with a 35% visible green index may be lower than that of the undergraduate student group. In conclusion, introducing green plants is an important way to enhance the recovery benefi ts in college classrooms. When designing indoor greening, it is necessary to set the visible green index appropriately and to take into account the personalized needs of college students and the characteristics of the population.