Pig manure is one of the effective measures to broaden the sources of feed and prevent the low production cost. Feeding fish with pig manure has the advantages of rich nutrition, rapid fish growth, high meat increase rate, less water pollution, and low incidence. The method is as follows: 1. Application method. The pig house can be built on one side of the pond so that the excrement discharged from the pig can flow into the fish pond through the manure channel. A part of the pig can be directly ingested by the fish, and the other part can be used to cultivate plankton in the water. In general, 5-8 pigs can be stocked for every 667 square meters of pond. Before the stocks of the ponds are cleared, the fermented pig manure can be used as a base fertilizer. About 300 kilograms can be applied per 667 square meters of fish ponds. When used as top dressings, every 10 days or so, every 667 hours. About 120 kg of square meters. The specific application times and quantity should be determined according to the color of the water. The quality of fish ponds should be grass green and tea brown. When the color of water is rust, the amount of pig manure should be reduced. At the same time, it is necessary to match some of the concentrate feeds to promote the rapid growth of fish. 2, fermentation method. The dried pig manure collected shall be dried, crushed and then added with 10% wheat bran or corn flour, mixed with water and stirred, and the amount of water added is preferably such that the pig dung is held in the hands with water without dropping, and then it is put into cement pool or soil. The pool is layered tightly, filled with plastic cloth and sealed at the mouth, and fermented for 3 to 5 days at a temperature of 20 to 30°C. Fermented pig manure can be fed directly to the fish, or it can be fed with 28% bran and 12% peanut cake to make a group of fish. Every day at 8 o'clock in the morning, at 12 o'clock in the afternoon and at 5 o'clock in the afternoon, each spot is fed once. Daily dosage is 4%-6% of the total body fish weight. 3, drying method. The collected pig manure is dried or air-dried. After crushing, it is processed into pellets by mixing 54% of pig manure, 10% of bean cake, 30% of bran, 4% of fishmeal, 2% of salt and additives. Or chopped feeding. This method is suitable for the ponds where the main grasses, the polyculture ponds, and the squid are bred.