With the information construction in the army improving continuously, the network information technology in military academies has been widely used and gradually become an indispensable tool in research, day-to-day work and teaching. Sharing of information resources greatly improve the efficiency of work, however, the security problems draw much attention. The network information security gradually become a noticeable issue in military academies. The information security problems in the information construction and the causes are analyzed. The corresponding measures are put forward,which is aimed at improving the level of the security of network information in military academies and offers higher security and reliable information service.