In view of the information security problems faced by the industrial control system in the military industry, the information security risks in the new industry environment are discussed. This paper expounds the development history of industrial control system in military industry. According to the application of control system in military industry and the current situation of information security, it analyses the information security risks of existing industrial control system equipment, digitalization and informatization, information security technical standards, and the absence of relevant laws and regulations, and puts forward some countermeasures to improve the information security protection capability of military industry. This study has a high practical reference value.