Abstract: In view of lack of relevant techno-economic verification system for design，construction and aquaculture operation of ship-type platforms in China，based on characteristics of ship type platform，through parameter design of platform principal dimension，aquaculture water volume，platform aquaculture technology and target commercial fish species，which affect platform construction and operating economy，economic indexes were selected，such as net present value，net present value index，investment payback period and breeding effect coefficient，together with initial investment，set of factors that make up economic argument ，grid method，fuzzy comprehensive evaluation and grey correlation analysis were used to evaluate and optimize platform scheme.The initial investment，cycle breeding cost，fish price，survival rate and expected benchmark rate of return were selected as uncertainty factors for sensitivity analysis.According to example calculation，initial investment of platform should not exceed 425 million yuan，cost of breeding of each cycle should be less than 137 million yuan，expected benchmark rate of return on investment should not exceed 25.0%，survival rate should be higher than 85.8%，and average price of four commercial fish should not be less than 109 yuan /kg.