By adopting Literature research method, questionnaire method, logic analysis method and mathematical statistics method in exploring the theory and practice of digital campus construction in physical education institution under information technology environment; taking guiding and referencing effect in informational construction development in physical education institution. The result demonstrates that the construction of Campus Network (NC) provides supporting platform for improving PE education quality and education reformation; while the construction of multi-media classroom provides necessary hardware guarantee for informational education; establishing comprehensively functional and convenient and practical informational software platform is the key step; enrich the source of PE education, promote the construction of informational education source, promote teachers' informational competency, promote the level of coursewares and applications in class. 1 Construcation of ampus Network (NC) provides supporting platform for improving PE education quality and education re-formation The construction of campus network is an important project in implement informatization in PE institutions; it is great move in deepening PE education reformation in new period, and improving the quality of education in PE education. The construction of campus network provides supporting platform for the structural adjustment in PE institution's professions, construction of coursework materials and resource sharing, reformation and innovation between practical teaching and training, construction of teacher teams and the multi-demands of quality monitoring system, promoting the quality of PE education. Shenyang Sport University's network framework connecting to individual's desktop via trillions of Mbps. It is compatible to both IPv6 and IPv4 protocol. It is divided into three layers, Core Layer, Merging layer and Input layer. The network between merging layer and core layer is using flow load sharing upstream. It fully ensures the availability of high bandwidth and high reliability of traffic grooming. Connecting to Chinese internet with bandwidth of 100M, while 10M to education network. Campus Network is available 24/7, which provides