Abstract:The distinctiveness and advancement of the deep-sea battlefield space have led to progress and reforms in the deep-sea military field, as is gradually changing the strategic pattern of military struggle. Therefore, it is imperative that the building of deep-sea battlefield environment support capabilities be accelerated to provide fundamental support for safeguarding China"s national security and overseas interests. This paper summarizes the concept of deep sea and the environmental impact, points out the situation and future challenges facing China, makes a profound analysis on the battlefield environment support needs in scenarios such as deep-sea strategic deterrence, submarine navigation, navigating and positioning, preset of weapons, and forecast and early warning, and puts forward corresponding measures and suggestions.