With　the　rapid　development　of　network　information　technology,　network　information　technology　has　been　widely　applicated　in　enterprise.　How　secure　is　company＇s　information?　Nowadays　network　security　is　a　threat　to　all　enterprises,　This　paper　analyzes　the　current　situation　of　the　enterprise　network　security,　expounds　the　typical　problems　existing　in　the　enterprise　network　security　work,　carries　out　the　network　information　security　construction　from　the　management,　control,　technology　and　other　aspects,　and　constructs　the　three-dimensional　information　security　protection　system.It　is　of　great　significance　to　strengthen　the　construction　of　enterprise　network　security　so　as　to　ensure　the　network　information　security.