Abstract: With 15 medium-sized and small enterprises (MSEs) of marine aquaculture in Xiuyu District, Putian City as samples, the loan willingness of MSEs were studied with the questionnaire survey, and the credit risk of formal financial institutions were investigated by consulting the local financial institutions on related policies and business. Then the reasons why MSEs of mariculture chose financing from the formal financial institutions were analyzed, and the suggestions for avoiding loan risks were proposed.