Abstract: In the rapidly changing society, there are more and more information related exchanges. It can be said that, whether in our daily life or in the confidential exchange of enterprises, there is a close relationship between network security and information. Especially with the comprehensive construction of information technology, information operation management has become one of the hot topics in the current enterprise development. It can be said that enterprise LAN operation plays an important role in the security management of enterprise internal information. In this regard, the article shows a simple overview of the local area network, on this basis, the existing problems of enterprise LAN operation and maintenance management, and how to ensure the enterprise network security management are studied and analyzed.