Abstract: Through research,the evaluation method of seawater pumped storage resources and the site selection principle of power station is mastered. In view of the special problems brought by the marine environment,such as seawater corrosion,biological adhesion,reservoir water leakage,typhoon and salt fog,research is done on common key technologies for the design of hydraulic and electromechanical equipment.An empirical platform is built to study the dynamic characteristics and control strategy of variable speed units. A complete set of key technical schemes are formed and guidelines for seawater pumped storage power station are designed to guide the construction of subsequent projects. This paper systematically expounds the main problems,solutions and research results faced by the design of seawater pumped storage power stations from the perspectives of resources evaluation and restriction principle research,hydraulic structure design and electromechanical design so as to form a complete set of key technical schemes supporting engineering design and fill the technical gap of seawater pumped storage power stations in China.