Aiming　the　phenonena　of　non-traditional　security　incidents　more　and　more　frequently　and　comprehensively　occurred,　this　paper　puts　forward　a　new　security　notion　named　macro-security.　Based　on　the　notion,　urban　macro-security　system　was　presented.　According　to　the　macro-security　theory,　the　strategy　adjustment　and　the　administrative　system　reform　of　urban　security　management　were　discussed.