Further, the information of feed addition in shrimp ponds was also investigated. We found that the quantity of feed addition was increased as shrimp growing. The shrimp grows very fast especially in August and September. With changes in the time during these periods, the quantity of added feed was largest, and pollution intensity reached the maximum value. It suggests that the wastewater in ponds should be drained off and changed by freshwater at that time. Moreover, the feed addition mainly consists of crude protein. After adding these feed, they flowed to water body mostly in the form of nitrogen, and only about 1% in the form of phosphorus. Besides, the excrement of shrimp and superfluous of feed could also exert a bad influence to water body in aquacultural ponds