Abstract:With the continuous progress of ocean observation technology, more and more technical means have been provided for marine environmental safety technology. The marine environmental security technology plays an indispensable role in the national Belt and Road Initiatives. Meanwhile, it not only plays a crucial role in the achievement of building a maritime power and the maintenance of national maritime security, but also plays a positive role in promoting the construction of a "community with a shared future for the oceans" and implementing the goal of marine sustainable development. Based on the practical problems, this study introduces the system composition of marine environmental security technology, namely marine environment parameter perception technology, data integrated and analysis technology and application security technology. This paper expounds the current situation of the marine environmental security technology as well as its developmental trends in the future from four perspectives:(1) full-time, global and multidimensional monitoring and detection capability; (2) efficient, safe, stable and reliable information transmission capability; (3) real-time, accurate, objective and quantitative prediction capability; and (4) the capability of accurate tactic selection, efficient and convenient auxiliary decision-making and precise technical support.