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Several terrorist attacks have taken place in campus since 2010, which made people amazed. After surprise, we all lost in mind: how to strenthen the security guard of our campus? In my opinion, we school should be strict with the guard of the school gate, and keep alert 24 hours a day. when it is time to have lesson, the school gate should be closed.What's more, it is necessary to have some policemen guard the campus every now and then. thirdly, it is the education of how to protect oneself and the awareness of secrity that counts most. Therefore, we all have duty to do something to our campus security.