The　cerebrovacular　diseases　are　important　causes　of　mortality　and　disability　in　the　world,　and　with　the　development　of　science　and　technology,　many　mission-oriented　basic　researches　are　aimed　at　the　ischemic/hypoxic　brain　injury.　This　paper　introduces　some　progress　made　in　our　research　in　this　field,　which　includes:　the　animal　experiment　model　of　brain　injury;　the　technique　to　efficiently　extract　evoked　potentials　from　electroencephalogram;　and　the　identification　of　the　characteristic　information　of　brain　injury.