In order to realize the optimal scheme design of power system for a deep sea aquaculture platform, combining with the characteristics of the mooring and cruising aquaculture mode, the dynamic load of the aquaculture system was integrated, the requirements of fishing suitability, reliability and economy of the power system were analyzed, and the scheme selection and demonstration were carried out. Three power system schemes of conventional propulsion, AC electric propulsion and DC distribution network electric propulsion technology were constructed, and the initial investment, daily operation, reliability analysis and late maintenance cost of each power system scheme were obtained and compared. Through the comprehensive analysis of the advantages and disadvantages of each power system scheme, it is concluded that the AC electric propulsion system scheme with four generator sets is the optimal configuration scheme to realize the optimal matching of dynamic load of aquaculture platform power system, power supply system and aquaculture system.