In order to solve the overwintering problems in the process of marine fish farming in Jiangsu coastal areas, a recirculating aquaculture system based on heat preservation effect of solar greenhouse and purification of wastewater by intensive algal cultures was constructed for the overwintering experiment of Sparus macrocephlus. The heat preservation property of solar greenhouse was studied through the temperature inside and outside the system during the winter recorded by a real-time monitoring system; the purification of wastewater by intensive algal cultures was studied by comparison of the different water qualities before and after the intensive cultures of algal. The results showed that the water temperature in greenhouse during winter was significantly higher than that outside the greenhouse, which will be beneficial for the survival of Sparus macrocephlus during winter. The ammonium concentration decreased and the nitrite concentration maintained at a low level in the recirculating aquaculture system by intensive algal cultures, which would be helpful for the stability of aquaculture water quality. The study proved that recirculating aquaculture system based on heat preservation effect of solar greenhouse and purification of wastewater by intensive algal cultures was beneficial for the overwintering growth of black seabream. This study can provide some suggestions for the development of marine fish farming in areas where are faced with overwintering problems.