(Today, with the rapid development of information technology and the rapid development of network technology, information transmission is not only limited to the transmission of simple text data and digital data, followed by the widespread use of multimedia technologies such as video and audio. With the development of technology, the performance of network equipment and the capacity of transmission media have been greatly improved. However, due to the increasing demand of users and the increasing complexity of the network environment, network design has become a more and more difficult subject. As the design of campus local area network Success or failure will directly affect the performance of the school education network system, thereby affecting the teaching process and teaching effect. Through the campus network, the rapid exchange of information within the school, the school and domestic and international information can be achieved to achieve resource sharing, so that teachers and students can timely understand the latest developments in the development of science/science technology and higher education at home and abroad, and promote the development of teaching, scientific research and management. . As an important infrastructure of informatization construction, campus network has become an indispensable part of school teaching and management. The following mainly discusses the design and construction of campus LAN.)