Inside and invade type of school violence are having following feature of quantity rising, assaulter and sufferer collectivizing, injure of offence aggravating. In view of analyzing the cause, we should simultaneously search practical prevention and control mechanism,which include building crisis forecasting mechanism and improving direct and indirect prevention and control mechanism.Then, we could find potential personal safety problem of school, improve the condition of student’s with psychological illness, overawe illegal or criminal activity or increase barrier to crime.Therefore; the mechanism and actual precaution capability of our country school safety could be substantial promoted.