In recent years, fastpaced life has led to a gradual increase in the incidence of emotional disorders.In order to alleviate people′s tension and anxiety,this paper builds a relaxation training system in the form of online realtime feedback of EEG. The system extracts the relative power of the brain αwave index as feedback value and feeds it back to the user in the form of visual animation. Finally, 20 healthy subjects were subjected to EEG feedback relaxation training to verify the effectiveness of the system. The results showed that the SAS score of the selfrating anxiety scale of the subjects in the experimental group was reduced obviously, and there was significant difference (t=2411, P<005). Through the analysis of the relative total power of the resting EEG αwave index before and after training, in the experimental group, the relative total power of the αwave index measured after training is significantly higher than that of the previous measurement, and has significant difference (t=-4256, P<0 05); but this phenomenon is not observed in the control group.The above results show that the training system can achieve the effect of making the subject feel relaxed and the emotional reaction tends to be calm.