Qinghua Liu†, Yangyang Zhang†, Lingyun Guo and ZhengXia Wang* School of Computer Science and Technology, Hainan University, Haikou, China Introduction: Due to the lack of devices and the difficulty of gathering patients, the small sample size is one of the most challenging problems in functional brain network (FBN) analysis. Previous studies have attempted to solve this problem of sample limitation through data augmentation methods, such as sample transformation and noise addition.