In order to ensure normal teaching orde r, prote cting st ude nts ' healt hy growth, ensuring t hat national (property) is not l ost, t o prevent or mi nimize the occurre nce of safety accidents, foll ow the " prevent, rescue e ach othe r, ensure safety and reduce losses" pri nci ple, accor ding to t he local conditions, make the management system. 1, t he pri ncipal is the responsibility of schoo