Based on the above principle, a recycling and utilization mode of solid waste in Songjiang Modern Agricultural Ecological Park was constructed, which is shown in Fig. 5 schematically. In the agricultural ecological park, animal excrement was managed appropriately. However, domestic aquacultural wastewater was not all treated. Thus, the remaining untreated aquacultural wastewater, which owns huge water discharge and high pollution load, was the main pollution source. Water spinach floating bed, which could absorb large amounts of nitrogen and phosphorus efficiently, was chosen to purify the untreated aquacultural wastewater. Meanwhile, economic benefits could be achieved by harvesting the plants at regular and appropriate time. In addition ,the residue plants could be removed from aquatic area and used as crude material for methane production. The surplus biogas residue could be fermented to forage and fertilizer, which return back to aquaculture to aquaculture ponds and farmland ultimately. This recycling and utilization mode of solid waste in ecological agricultural park could not only realize the harmless discharge of wastes, but also achieve reutilization of resources, which could provide a good sample for sustainable development in ecological agricultural park.