As the pace of life is getting faster ,more and more people feel tire. fatigue means not only physically distress but aslo high spirit intension. Fatigue may means nothing for ordinary people, but it means the drop of the body function to the people who has a special occupation, such as the car drivers or pilots. The dropping of the body function is likely to cause traffic accident, which is dangerous to both yourself and other people. Therefore, it is significant to predict the fatigue of the driver and make the pre-alert. The problem for pilot fatigue test, this paper puts forward a method based on brain electrical fatigue detection methods ,Through the inspection, and then after the eeg preamplifier, filter circuits, 50Hz subsidence filter is, and subsequent processing circuit which can predict the fatigue, and drivers be prompted the police. （人工翻译）