As commonly known, concrete, in comparison to materials such as steel and polymers, offers superior corrosion resistance and lower cost in developing floating structure, making it a prime choice in marine construction industry. However, due to the critical environments of marine, especially the area close to the seas of southern China, the floating structure should resist the impact of marine wave and high concentration erosion ions, which may exceed the load-bearing capacity of ordinary concrete. Therefore, to overcome the obstacles mentioned above, this manuscript provides a comprehensive overview of a newly developed Ultra-High Performance Concrete (UHPC) with advanced mechanical properties, volume stability and corrosion resistance. To be specific, a new model considering the effect of liquid phases and chemical reaction on the particle packing is proposed to obtain a UHPC matrix with high density. Additionally, a new strategy is utilized to optimize the orientation and distribution of steel fibers, which is beneficial for improving the toughness of concrete. Furthermore, a multiply defense method is proposed to resist the penetration and corrosion of harmful ions. In general, based on the approaches developed in this study, an advanced composite material can be produced, which can effectively support the construction of floating concrete structure served in marine environment.